TOEFL Reading 問題集（パッセージ6本・設問60問）

TOEIC 700 から TOEFL iBT Reading 28+/30 を目指す問題集。 構成：易2本（標準語彙）→ 中2本（学術語彙）→ 難2本（高度学術語彙）。 各パッセージに 10 問（本番形式）。

TOEFL Reading セクション概要

設問タイプ（10種類）

戦略

1. タイトル → 第1段落：3分以内で全体テーマと構造を把握

2. 段落ごとに簡略メモ：「§1 = 概要」「§2 = 第一の理由」など

3. 設問タイプ別アプローチ：

   • Factual / Negative Factual / Vocabulary / Reference → パッセージ参照型 → スキャン
   • Inference / Rhetorical Purpose / Sentence Simplification → 思考型 → 段落要約理解
   • Insert Text → 前後の論理関係（however, therefore, also など）に注目
   • Prose Summary → メインアイデア中心、詳細は除外

4. 語彙力：TOEFL は単純な同義語問題が 2-3 問/パッセージ → 単語量を増やすほど 28+ に近づく

目次

TR-1: The Origin of Coal（易・地質学）

[§1] Coal is a fossil fuel that has played a critical role in human civilization since the Industrial Revolution. It is formed from the remains of plants that lived millions of years ago in vast swampy forests. When these plants died, they fell into stagnant water where there was insufficient oxygen for complete decomposition. Over time, layers of dead vegetation accumulated and were eventually buried under sediment, creating the conditions necessary for coal formation.

[§2] The transformation from plant matter to coal occurs in stages. First, the plant material becomes peat, a soft brown substance that still contains visible plant fragments. As more sediment accumulates above, the increasing pressure and heat gradually compress the peat, expelling water and gases. After millions of years, peat transforms into lignite, a low-grade coal that retains some plant structure. Continued pressure and heat convert lignite into bituminous coal, which is darker, denser, and contains more carbon. The final stage, anthracite, is the hardest and cleanest-burning form of coal, containing nearly 90% carbon.

[§3] The vast majority of the world's coal deposits formed during the Carboniferous period, approximately 360 to 300 million years ago. During this time, Earth's climate was warmer and more humid than today, and large parts of the continents were covered by tropical swamp forests. The dominant plants were giant ferns, horsetails, and primitive trees, which grew to enormous sizes due to high oxygen levels in the atmosphere. When these plants died and fell into the swamps, they accumulated in massive layers that would later become the coal seams of today.

[§4] The geographic distribution of coal reflects the position of continents during the Carboniferous period. Major coal deposits are found in regions that were once located near the equator: the eastern United States, Western Europe, China, and parts of Russia. Plate tectonics has since moved these regions to their current positions. ▣A The exception is Antarctica, which contains substantial coal reserves dating from the same period, indicating that this now-frozen continent was once warm enough to support tropical forests. ▣B This counterintuitive fact has been used as evidence for continental drift.

[§5] Despite its importance as an energy source, coal is a finite resource. Once extracted and burned, it cannot be regenerated on any human-relevant timescale—the formation process requires millions of years. ▣C Moreover, burning coal releases substantial amounts of carbon dioxide, contributing to climate change. ▣D Many countries are now reducing their reliance on coal in favor of cleaner energy sources, though it remains the largest single source of electricity globally.

Q1（Factual Information）

According to paragraph 1, why was complete decomposition of plant matter prevented?

(A) The plants were buried too deeply. (B) The water lacked sufficient oxygen. (C) The plants were too old. (D) Sediment poisoned the water.

解答: (B) 解説: §1「fell into stagnant water where there was insufficient oxygen for complete decomposition」

Q2（Vocabulary）

The word "expelling" in paragraph 2 is closest in meaning to:

(A) attracting (B) absorbing (C) forcing out (D) heating

解答: (C) 解説: expel = drive out, force out

Q3（Factual Information）

According to paragraph 2, anthracite is:

(A) the same as peat (B) softer than lignite (C) the hardest form of coal (D) low in carbon

解答: (C) 解説: §2 末「anthracite, is the hardest and cleanest-burning form of coal, containing nearly 90% carbon」

Q4（Inference）

Paragraph 3 implies that the giant size of Carboniferous plants was likely related to:

(A) cooler temperatures (B) high atmospheric oxygen levels (C) lack of competition (D) frequent rainfall

解答: (B) 解説: §3「grew to enormous sizes due to high oxygen levels」

Q5（Negative Factual Information）

All of the following are mentioned as locations of major coal deposits EXCEPT:

(A) eastern United States (B) Western Europe (C) Australia (D) China

解答: (C) 解説: §4 で挙げられるのは US, W.Europe, China, Russia, Antarctica。Australia は登場しない。

Q6（Rhetorical Purpose）

The author mentions Antarctica in paragraph 4 primarily to:

(A) indicate that climate change is recent (B) suggest that even apparently inhospitable regions once supported tropical ecosystems (C) argue against continental drift (D) compare polar and equatorial coal

解答: (B) 解説: §4「now-frozen continent was once warm enough to support tropical forests」

Q7（Reference）

The word "this" in paragraph 4 refers to:

(A) plate tectonics (B) the geographic distribution of coal (C) the position of continents (D) the fact that Antarctica contains coal from a tropical period

解答: (D) 解説: 直前文「Antarctica was once warm enough to support tropical forests」を指す。

Q8（Sentence Simplification）

Which best expresses the essential information of: "Once extracted and burned, it cannot be regenerated on any human-relevant timescale—the formation process requires millions of years."

(A) Coal is a renewable resource that can be quickly replaced. (B) Coal cannot be replenished within timeframes meaningful to human life because its formation takes millions of years. (C) Coal extraction is environmentally harmful. (D) Burning coal is faster than forming it.

解答: (B) 解説: timescale = 時間尺度、human-relevant = 人類に意味のある時間 → B が忠実な圧縮。

Q9（Insert Text）

Where would the following sentence best fit? "However, because coal seams take so long to form, current consumption rates raise serious sustainability concerns."

▣A ▣B ▣C ▣D

解答: ▣C 解説: §5 直前で「coal is a finite resource」と述べ、▣C 直前は「formation requires millions of years」。挿入文の "current consumption rates raise sustainability concerns" は次の文「Moreover, burning coal releases CO₂」と並列で持続可能性論点を導く位置として最適。

Q10（Prose Summary）

Select the THREE statements that express the most important ideas of the passage.

(A) Coal is formed from ancient plants buried in oxygen-poor swamps and progresses through stages of increasing carbon content. (B) Most modern coal deposits originated in the Carboniferous period when widespread tropical swamp forests existed. (C) Antarctica's coal proves that polar regions are warming. (D) The geographic distribution of coal reflects ancient continental positions, and burning coal raises environmental and sustainability concerns. (E) Lignite is more valuable than anthracite. (F) Tropical climates support insect biodiversity.

解答: (A), (B), (D) 解説:

• (A) 形成過程の主旨
• (B) 主要起源時代
• (D) 分布と現代的含意
• (C) 誤読、(E) 事実誤認、(F) 範囲外

TR-2: The Domestication of the Horse（易・動物史）

[§1] The domestication of the horse marked one of the most significant transformations in human history, reshaping warfare, transportation, agriculture, and trade. Genetic and archaeological evidence increasingly points to the steppes of present-day Kazakhstan and southern Russia, around 4,000 to 3,500 BCE, as the original site of horse domestication. The Botai culture, which flourished in this region, has yielded numerous horse remains showing wear patterns on teeth consistent with bridles—the earliest physical evidence of riding.

[§2] Domesticating the horse posed challenges absent in the earlier domestication of cattle, sheep, and goats. Horses are large, fast, and instinctively flee from predators rather than freezing, making them difficult to capture and even harder to train. Researchers believe domestication required a combination of selective breeding for tameness over many generations and the development of new technologies for control, such as the bridle, the saddle, and eventually the stirrup. ▣A The genetic legacy of this process is striking: nearly all modern domestic horses descend from a single ancestral population that lived on the western Eurasian steppes, while the male lineage is even narrower, deriving from just a small number of stallions. ▣B

[§3] Once domesticated, horses transformed the societies that adopted them. Mounted warriors could move faster and farther than infantry, granting steppe peoples like the Scythians and later the Mongols decisive military advantages. Horse-drawn chariots enabled the Hittites and Egyptians to project power over wide territories. The horse-collar, a Chinese innovation that distributed the load across the chest rather than the throat, allowed horses to pull heavier plows than oxen, dramatically increasing agricultural productivity. ▣C Long-distance trade across continents became possible: the Silk Road, which connected China to the Mediterranean, depended fundamentally on horse-based transportation.

[§4] Despite the horse's revolutionary impact, its initial spread was uneven and contested. ▣D Some societies, particularly in the Americas, had no contact with horses until European arrival in the 1500s. Indigenous peoples of North America, however, rapidly mastered horsemanship after acquiring escaped Spanish horses, transforming nomadic plains cultures within decades. Other societies actively resisted horse-based warfare, finding their existing military doctrines disrupted by the speed and mobility of cavalry.

[§5] Today, the horse's economic role has diminished in industrialized nations, replaced by motor vehicles. Yet the horse remains culturally significant, used in sports, ceremony, and recreation worldwide. The genetic and archaeological story of its domestication continues to be refined as new techniques—particularly ancient DNA analysis—reveal previously hidden details about how this single animal reshaped the trajectory of human civilization.

Q1（Factual Information）

According to paragraph 1, the earliest physical evidence of horse riding comes from:

(A) DNA analysis of modern horses (B) wear patterns on horse teeth from the Botai culture (C) ancient cave paintings (D) Mongol-era weapons

解答: (B)

Q2（Vocabulary）

The word "yielded" in paragraph 1 is closest in meaning to:

(A) refused (B) produced or revealed (C) hidden (D) destroyed

解答: (B) 解説: yield = 産出する・提供する

Q3（Inference）

Paragraph 2 implies that horse domestication required:

(A) less effort than cattle domestication (B) the simultaneous development of biological and technological innovations (C) a single generation of breeding (D) abandoning earlier livestock

解答: (B) 解説: §2「selective breeding ... and the development of new technologies for control」

Q4（Vocabulary）

The word "decisive" in paragraph 3 is closest in meaning to:

(A) gradual (B) modest (C) conclusive or definitive (D) temporary

解答: (C)

Q5（Negative Factual Information）

All of the following are mentioned as effects of horse domestication EXCEPT:

(A) increased agricultural productivity (B) extension of long-distance trade (C) elimination of all infantry warfare (D) military advantages for steppe peoples

解答: (C) 解説: 「elimination of all infantry」は本文に記載なし。歩兵が無くなった話はしていない。

Q6（Rhetorical Purpose）

The author mentions the horse-collar in paragraph 3 primarily to:

(A) provide an example of how technological innovation enabled horses to take over agricultural roles previously dominated by oxen (B) credit Chinese inventors for all agricultural innovations (C) compare horses and oxen (D) introduce the topic of trade

解答: (A)

Q7（Factual Information）

According to paragraph 4, North American indigenous peoples:

(A) domesticated their own native horses (B) rejected horses entirely (C) rapidly adopted horsemanship after Spanish contact (D) used horses only for ceremonies

解答: (C)

Q8（Sentence Simplification）

Which best expresses: "Mounted warriors could move faster and farther than infantry, granting steppe peoples like the Scythians and later the Mongols decisive military advantages."

(A) The Scythians defeated the Mongols on horseback. (B) Steppe peoples gained important military edges because their cavalry was faster and could travel longer than infantry forces. (C) Infantry was preferred to cavalry by all civilizations. (D) Steppe peoples were the only ones to ride horses.

解答: (B)

Q9（Insert Text）

Where would the following sentence best fit? "This dramatic genetic bottleneck reflects how few wild horses successfully passed through the domestication filter."

▣A ▣B ▣C ▣D

解答: ▣B 解説: ▣B 直前で "deriving from just a small number of stallions" と語っており、挿入文の "genetic bottleneck" は直接の解説。論理的接続として最適。

Q10（Prose Summary）

Select the THREE most important ideas:

(A) The domestication of the horse occurred on the Eurasian steppes around 4,000-3,500 BCE and required both genetic selection and new technologies. (B) Once domesticated, the horse transformed warfare, agriculture, and trade across many civilizations. (C) Modern horses are immune to disease. (D) Horse domestication spread unevenly across the world, with some regions adopting horses only after European contact. (E) Horses always produce only one foal per year. (F) The Silk Road was the only trade route that used horses.

解答: (A), (B), (D)

TR-3: The Industrial Revolution and Urbanization（中・経済史）

[§1] The Industrial Revolution, which began in eighteenth-century Britain and spread across Europe and North America during the nineteenth century, transformed not only economic production but also the spatial organization of society. Before industrialization, the great majority of the population lived in rural areas, working primarily in agriculture. The new factory system, which concentrated production in large mechanized facilities, demanded a corresponding concentration of labor. Workers migrated en masse from villages to industrial centers, and the modern city as we know it began to take shape.

[§2] The pace of urban growth was unprecedented. Manchester, the world's first industrial city, swelled from approximately 25,000 inhabitants in 1772 to over 300,000 by 1851—a twelvefold increase in less than a century. Other British cities, including Glasgow, Birmingham, and Liverpool, grew at comparable rates. Continental cities followed similar trajectories somewhat later, with industrial centers like Lille, Essen, and Łódź transforming from market towns into major urban agglomerations within a few generations. American cities, particularly Pittsburgh, Chicago, and Detroit, would later experience even more dramatic expansion.

[§3] The conditions in these rapidly growing cities were, however, often catastrophic. Housing was thrown up hastily and cheaply to accommodate the influx of workers, with multiple families crowded into single rooms. Sanitation infrastructure—sewers, clean water supplies, waste collection—lagged decades behind population growth. The result was recurrent epidemic disease: cholera outbreaks killed thousands in mid-nineteenth-century London, and tuberculosis became endemic in working-class neighborhoods. Life expectancy in industrial slums was often a decade lower than in surrounding rural areas, despite higher money wages.

[§4] These conditions provoked diverse responses. Sanitary reformers like Edwin Chadwick in Britain documented urban squalor and lobbied for state intervention; their efforts eventually led to the Public Health Acts and the construction of major sewer networks in the second half of the nineteenth century. Socialist thinkers, including Marx and Engels, drew on industrial cities for their theoretical frameworks: Engels's The Condition of the Working Class in England offered a searing description of Manchester's poverty. Some industrialists, motivated by paternalism or self-interest, built model factory towns providing better housing and amenities, though these remained exceptional rather than typical.

[§5] Beyond physical conditions, industrial cities also generated new social patterns. Traditional ties of family and village were strained as individuals relocated to cities where they often knew few others. New forms of association emerged—labor unions, mutual aid societies, religious congregations of newcomers, political clubs—that gradually became the institutional fabric of urban life. The cultural innovations of nineteenth-century cities, from cheap newspapers and music halls to professional sports and department stores, both responded to and shaped this new mode of human existence.

[§6] The legacy of nineteenth-century urbanization remains visible today. Patterns of urban poverty, infrastructural inequality, and political activism that emerged in industrial cities continue to influence contemporary urban life. Furthermore, the developing world's current urbanization—China's, India's, Africa's—often unfolds at speeds and scales that dwarf even the dramatic growth of nineteenth-century Manchester, raising questions about whether historical responses can guide present-day urban policy.

Q1（Factual Information）

According to paragraph 2, the population of Manchester in 1851 was approximately:

(A) 25,000 (B) 100,000 (C) 300,000 (D) 1,000,000

解答: (C)

Q2（Vocabulary）

The word "swelled" in paragraph 2 is closest in meaning to:

(A) declined (B) stabilized (C) increased greatly (D) shrank

解答: (C)

Q3（Vocabulary）

The word "endemic" in paragraph 3 is closest in meaning to:

(A) seasonal (B) regularly present (C) deadly (D) eliminated

解答: (B) 解説: endemic = 常在的、地域に恒常的に存在する

Q4（Inference）

Paragraph 3 suggests that:

(A) higher wages always meant better living conditions (B) industrial slums had health outcomes worse than rural areas despite higher pay (C) cholera was rare in cities (D) sanitation was prioritized from the start

解答: (B)

Q5（Rhetorical Purpose）

The author mentions Edwin Chadwick in paragraph 4 primarily to:

(A) introduce a policy reformer who pushed for state intervention against urban squalor (B) describe the founding of Manchester (C) compare British and American reforms (D) criticize sanitary engineering

解答: (A)

Q6（Factual Information）

According to paragraph 4, model factory towns built by some industrialists were:

(A) the typical solution to urban housing (B) exceptions rather than the norm (C) financed by Marx (D) only built in Continental Europe

解答: (B)

Q7（Negative Factual Information）

All of the following are mentioned as new social institutions in industrial cities EXCEPT:

(A) labor unions (B) mutual aid societies (C) religious congregations of newcomers (D) feudal manor courts

解答: (D)

Q8（Sentence Simplification）

Which best expresses: "Sanitation infrastructure—sewers, clean water supplies, waste collection—lagged decades behind population growth."

(A) Population growth was slower than infrastructure development. (B) The development of sewers, water supplies, and waste collection lagged decades behind the rapid expansion of urban populations. (C) Sanitation was abandoned in cities. (D) Cities lacked any infrastructure.

解答: (B)

Q9（Inference）

The author would most likely agree that:

(A) historical industrialization is irrelevant to modern urbanization (B) modern urbanization in the developing world may proceed at scales that exceed nineteenth-century precedents (C) all nineteenth-century cities had the same outcomes (D) Marxism solved urban poverty

解答: (B) 解説: §6「current urbanization ... at speeds and scales that dwarf even the dramatic growth of nineteenth-century Manchester」

Q10（Prose Summary）

Select the THREE most important ideas:

(A) Industrialization concentrated workers in cities, producing unprecedented urban growth. (B) Marx and Engels invented urbanization. (C) The conditions in industrial cities were often dire and prompted reform movements, ideological responses, and limited industrialist initiatives. (D) New social institutions and cultural forms emerged in industrial cities, shaping modern urban life. (E) Manchester is now larger than London. (F) All factories are now closed.

解答: (A), (C), (D)

TR-4: Plate Tectonics and Mountain Formation（中・地球科学）

[§1] The theory of plate tectonics, developed in the 1960s, transformed our understanding of how Earth's surface is shaped. According to this theory, the planet's outer shell, the lithosphere, is broken into roughly fifteen major plates and several smaller ones. These plates float on a partially molten layer called the asthenosphere and slowly move at rates of a few centimeters per year, driven by convection currents in Earth's mantle. Where plates interact—through collision, separation, or sliding past one another—the most dramatic geological features of our planet are formed.

[§2] Mountains form primarily through three tectonic processes. The first, and most spectacular, is continental collision. When two continental plates converge, neither is dense enough to sink beneath the other; instead, both crumple and stack upward. The Himalayan range, the highest on Earth, is the product of an ongoing collision between the Indian Plate and the Eurasian Plate that began approximately 50 million years ago. The Indian Plate continues to push northward at about five centimeters per year, causing the Himalayas to grow taller—though erosion offsets some of this rise.

[§3] The second process is subduction, in which an oceanic plate descends beneath either another oceanic plate or a continental plate. The denser oceanic crust sinks into the mantle, where it melts; the resulting magma rises to form volcanic mountain chains parallel to the subduction zone. The Andes of South America, formed by the Nazca Plate sliding beneath the South American Plate, illustrate this process. So do the volcanic chains of the Pacific "Ring of Fire," from the Aleutian Islands through Japan to New Zealand. ▣A These mountains differ from collision-formed ranges in that they are typically narrower, dominated by individual volcanoes, and aligned along plate boundaries.

[§4] The third process is rifting, in which a continent begins to split apart. ▣B As tectonic forces stretch the lithosphere, blocks of crust fault and tilt, producing parallel ranges separated by valleys. The Basin and Range Province of the western United States, with its alternating mountain ranges and broad desert basins, exemplifies this. ▣C The East African Rift, where Africa is slowly tearing into separate landmasses, demonstrates that rifting can eventually lead to the formation of new ocean basins, with mountains forming along the rift's flanks.

[§5] All three processes operate over timescales largely incomprehensible to human experience. The mountains visible today represent only the current state of dynamic geological systems—snapshots of ranges that have been forming and eroding for tens or hundreds of millions of years. ▣D Some of the world's oldest mountains, such as the Appalachians of eastern North America, were once as tall as the Himalayas but have been worn down by hundreds of millions of years of erosion. Conversely, today's modest hills may, given enough time and tectonic activity, eventually rise to alpine proportions.

[§6] Plate tectonics also explains phenomena that long puzzled geologists, such as the existence of identical fossil species on continents now separated by oceans, the linear distribution of earthquake epicenters, and the magnetic stripes recorded in oceanic crust. By offering a unified framework for these otherwise unrelated observations, plate tectonics is rightly regarded as one of the great scientific syntheses of the twentieth century, comparable in scope to Darwin's theory of evolution or Einstein's theory of relativity.

Q1（Factual Information）

According to paragraph 1, plates move at speeds of:

(A) hundreds of meters per year (B) several centimeters per year (C) a few millimeters per century (D) thousands of kilometers per million years

解答: (B)

Q2（Vocabulary）

The word "crumple" in paragraph 2 is closest in meaning to:

(A) flatten smoothly (B) collapse and fold (C) sink quickly (D) erode slowly

解答: (B)

Q3（Inference）

Paragraph 2 implies that the Himalayas are:

(A) shrinking (B) still actively rising, although erosion partially offsets this (C) the same height as 50 million years ago (D) older than the Indian Plate

解答: (B)

Q4（Factual Information）

According to paragraph 3, when an oceanic plate subducts:

(A) it remains at the surface (B) the resulting magma forms volcanic mountain chains (C) it stops the mantle's convection (D) erosion immediately destroys the plate

解答: (B)

Q5（Rhetorical Purpose）

The author mentions the Pacific Ring of Fire in paragraph 3 to:

(A) demonstrate the prevalence of subduction-zone volcanism around the Pacific (B) compare oceanic and continental crust (C) describe earthquake intensity (D) introduce rifting

解答: (A)

Q6（Vocabulary）

The word "exemplifies" in paragraph 4 is closest in meaning to:

(A) contradicts (B) serves as an example of (C) forbids (D) magnifies

解答: (B)

Q7（Negative Factual Information）

All of the following are mentioned as features of rifting EXCEPT:

(A) tilted blocks of crust (B) parallel ranges separated by valleys (C) potential formation of new oceans (D) sudden volcanic eruptions every century

解答: (D)

Q8（Inference）

Paragraph 5 suggests that the Appalachians:

(A) are still rising rapidly (B) were never tall (C) are remnants of a once much higher range now eroded (D) contain no rocks older than 50 million years

解答: (C)

Q9（Insert Text）

Where would the following sentence best fit? "Although seemingly destructive, this stretching can produce striking topography."

▣A ▣B ▣C ▣D

解答: ▣B 解説: ▣B 直前で "the third process is rifting, in which a continent begins to split apart" と紹介。挿入文「破壊的に見えるが、印象的な地形を生む」が直後の Basin and Range の説明への橋渡しになる。

Q10（Prose Summary）

Select the THREE most important ideas:

(A) Plate tectonics describes how Earth's broken lithosphere moves and interacts to shape the planet's surface. (B) Mountains form through three main tectonic processes: continental collision, subduction, and rifting. (C) Mountains are static features that do not change once formed. (D) The Earth's tectonic plates move at hundreds of meters per year. (E) Plate tectonics provides a unifying framework for previously disconnected geological observations. (F) Volcanoes only form along mid-ocean ridges.

解答: (A), (B), (E)

TR-5: Cognitive Development in Early Childhood（難・心理学）

[§1] Until well into the twentieth century, the dominant view of infant cognition held that newborns entered the world as passive recipients of sensory input, gradually acquiring mental capacities only as the brain matured. This conception, sometimes summarized in the metaphor of a "blank slate," was challenged by the developmental psychologist Jean Piaget, whose meticulous observations of his own children persuaded him that cognitive development proceeds through a series of structured stages, each characterized by qualitatively distinct ways of understanding the world. Although subsequent research has substantially modified Piaget's specific timetable—children, it appears, achieve many cognitive milestones earlier than he proposed—his fundamental insight that infants are active learners has been amply confirmed.

[§2] Among the most striking demonstrations of infant cognition concerns the perception of physical objects. By around four months of age, infants reliably exhibit surprise—measured by sustained looking time—when they witness events that violate basic physical principles, such as one solid object passing through another. This finding, established by Renée Baillargeon in the 1980s, suggests that infants possess implicit expectations about object permanence, solidity, and continuity well before they can crawl or speak. Whether these expectations are innate or rapidly acquired through environmental experience remains contested, but their early emergence is now widely accepted.

[§3] Equally important is the development of social cognition. Even very young infants show preferential attention to faces over equivalently complex non-face patterns and demonstrate sensitivity to a face's gaze direction. By their first birthday, children begin to engage in joint attention—coordinating their gaze with that of a caregiver toward a shared object or event. This capacity, while seemingly modest, is foundational: it underpins later language acquisition, the development of empathy, and the recognition that others have minds whose contents differ from one's own. Children with autism spectrum conditions often show atypical patterns of joint attention in infancy, providing one of the earliest behavioral indicators of the condition.

[§4] Language acquisition represents perhaps the most spectacular cognitive feat of early childhood. Within roughly five years, typically developing children move from babbling to mastery of complex grammatical structures—an accomplishment requiring no formal instruction. The linguist Noam Chomsky famously argued that this rapid acquisition, despite the ambiguity and incompleteness of the linguistic input children receive, demands the existence of innate grammatical structures specific to the human mind. While the strongest version of this nativist hypothesis remains controversial, considerable evidence supports the view that children come equipped with cognitive biases that shape how they parse linguistic input. ▣A The fact that nearly all children, regardless of culture, follow similar developmental trajectories—single words around twelve months, two-word combinations by twenty-four—reinforces the impression that language acquisition is constrained by biological maturation.

[§5] Yet biology alone cannot explain cognitive development. ▣B Linguistic and conceptual environments differ markedly across cultures and even households, and these variations leave significant traces. Children raised in households where caregivers engage in extensive conversation and book-reading show measurable advantages in vocabulary and pre-literacy skills upon entering school. ▣C Lev Vygotsky, working in the early Soviet Union, proposed that cognition develops through internalization of social and linguistic interactions; what children can do alone follows from what they have done in collaboration with more knowledgeable others. The "zone of proximal development"—the gap between independent performance and assisted performance—has become a foundational concept in educational psychology.

[§6] Synthesizing biological and environmental contributions remains an unfinished project. ▣D Modern developmental science increasingly emphasizes the bidirectional and continuous interaction between an active, biologically prepared infant and a structuring environment. Cognitive development emerges not from genes alone, nor from experience alone, but from the developmental interplay of the two. This perspective, sometimes called "developmental systems theory," is reshaping how researchers understand both typical development and conditions that depart from it.

Q1（Factual Information）

According to paragraph 1, Piaget's lasting contribution was:

(A) proving that infants are blank slates (B) establishing precise ages for every cognitive milestone (C) the insight that infants are active learners passing through structured stages (D) developing IQ tests

解答: (C)

Q2（Vocabulary）

The word "meticulous" in paragraph 1 is closest in meaning to:

(A) careless (B) very careful and detailed (C) brief (D) emotional

解答: (B)

Q3（Inference）

Paragraph 2 suggests that infants:

(A) cannot perceive physical objects until they walk (B) hold expectations about how solid objects behave well before they can crawl or speak (C) are unsurprised by impossible events (D) ignore unfamiliar objects

解答: (B)

Q4（Factual Information）

According to paragraph 3, joint attention is foundational because it:

(A) prevents autism (B) underpins later language, empathy, and the understanding that others have minds (C) is unique to humans (D) develops only after age five

解答: (B)

Q5（Vocabulary）

The word "atypical" in paragraph 3 is closest in meaning to:

(A) extreme (B) abnormal or different from typical (C) advanced (D) brief

解答: (B)

Q6（Rhetorical Purpose）

The author mentions Chomsky in paragraph 4 to:

(A) introduce the nativist position that innate grammatical structures explain rapid language learning (B) reject all biological explanations (C) compare languages (D) describe babbling

解答: (A)

Q7（Negative Factual Information）

All of the following are mentioned as cognitive achievements of early childhood EXCEPT:

(A) language acquisition (B) joint attention (C) calculus (D) expectations about object permanence

解答: (C)

Q8（Sentence Simplification）

Which best expresses: "Cognitive development emerges not from genes alone, nor from experience alone, but from the developmental interplay of the two."

(A) Genes alone determine cognition. (B) Experience alone determines cognition. (C) Cognition results from the dynamic interaction of genes and experience, not from either in isolation. (D) Cognition cannot be studied scientifically.

解答: (C)

Q9（Insert Text）

Where would the following sentence best fit? "Children acquire the language they hear, not language in general."

▣A ▣B ▣C ▣D

解答: ▣B 解説: ▣B 直前 "Yet biology alone cannot explain cognitive development." → 環境の役割への移行点。挿入文は環境（聞く言語）の重要性の例示。

Q10（Prose Summary）

Select the THREE most important ideas:

(A) Modern research shows that infants are active cognitive agents from very early ages, with capacities for object understanding, social cognition, and language emerging in a structured developmental sequence. (B) Innate biological structures, while important, do not fully account for cognitive development; environmental and social interactions also play essential roles. (C) Piaget invented all knowledge of child development. (D) Contemporary developmental science emphasizes the interplay between biological readiness and environmental experience. (E) Children with autism never develop language. (F) Vygotsky proved Chomsky wrong.

解答: (A), (B), (D)

TR-6: The Rise and Fall of the Roman Republic（難・政治史）

[§1] The Roman Republic, established traditionally in 509 BCE following the expulsion of the last Etruscan king, endured for nearly five centuries before collapsing into civil wars and ultimately giving way to the Empire under Augustus in 27 BCE. The Republic's longevity, geographical expansion, and eventual disintegration have long fascinated historians and political theorists, who have sought to extract lessons from its trajectory about the conditions under which republican institutions can flourish or fail.

[§2] Roman republican government rested on a balance among three institutional elements. The senate, composed of former magistrates and dominated by the patrician aristocracy, held formidable advisory authority and effectively controlled foreign policy and finance. Annual magistracies, of which the consulship was supreme, vested executive power in elected officials—but in pairs, so that each could veto the other, and only for one year at a time. Popular assemblies, in which adult male citizens voted on legislation and elected officials, provided a democratic element, although their procedures gave disproportionate weight to wealthier voters. This intricate system aimed to prevent the concentration of power in any single person or faction, and contemporary observers, including the Greek historian Polybius, attributed the Republic's stability to this constitutional balance.

[§3] Yet the system that managed governance for a city-state proved inadequate as Rome conquered the Mediterranean. Successful generals, commanding loyal armies of long-serving professional soldiers, accumulated wealth and political prestige beyond anything the Republic's checks were designed to constrain. Soldiers came to look to their commanders, rather than to the state, for land grants and pensions upon retirement, transforming armies into instruments of personal ambition. Conquered provinces, governed by senators whose tenures exceeded the one-year limit imposed within Italy, generated colossal private fortunes that further unbalanced political competition.

[§4] The first major rupture came with the brothers Tiberius and Gaius Gracchus, who in the late second century BCE pushed land reform legislation through the popular assembly, bypassing senatorial opposition. Both were ultimately killed by their political adversaries—Tiberius in 133, Gaius in 121 BCE—setting an enduring precedent that political disputes could be resolved through extra-constitutional violence. The traditional reading is that the Gracchi exposed a fundamental tension: the Republic's elites would resort to lethal force rather than accept reforms threatening their economic position. Whether this reading credits the Gracchi with sufficient sophistication remains debated; some historians argue they were less reformers than politicians cultivating popular constituencies for their own advancement.

[§5] Whatever their motives, the precedent of political violence proved consequential. The first century BCE witnessed an escalating series of crises: the dictatorships of Sulla, the populist agitation around Catiline, the formation of the so-called First Triumvirate uniting Pompey, Crassus, and Caesar, and ultimately the civil wars triggered by Caesar's crossing of the Rubicon in 49 BCE. Each crisis was resolved through the temporary ascendancy of one strongman whose accumulated authority eclipsed the institutions that had once constrained him. By the time of Caesar's assassination in 44 BCE—an act undertaken by senators precisely to restore republican government—the conditions enabling republicanism had so deteriorated that his death produced not restoration but a further round of civil war, ending only with Octavian's consolidation of power as Augustus.

[§6] Modern political theorists continue to debate what the Republic's collapse demonstrates. Some emphasize structural factors—military reforms, provincial wealth, the growing wealth gap between Rome's senatorial elite and its impoverished plebeian masses. Others stress the contingency of personal ambition: had Caesar been less brilliant or Cicero less reluctant to compromise, perhaps the institutions could have been preserved. Still others point to a more general lesson: that political institutions designed for one set of social and economic conditions may prove unsuited to a transformed environment, however carefully their original architects designed them. This last perspective has resonance well beyond the study of antiquity.

Q1（Factual Information）

According to paragraph 2, the Roman senate primarily controlled:

(A) the day-to-day enforcement of laws (B) foreign policy and finance (C) elections of all magistrates (D) the legions in battle

解答: (B)

Q2（Vocabulary）

The word "intricate" in paragraph 2 is closest in meaning to:

(A) simple (B) complex and detailed (C) ineffective (D) ancient

解答: (B)

Q3（Inference）

Paragraph 3 implies that the Republic's institutional design was:

(A) perfectly suited to imperial expansion (B) developed for a city-state and proved inadequate after Rome conquered the Mediterranean (C) eliminated immediately after expansion (D) exclusively designed by senators

解答: (B)

Q4（Vocabulary）

The phrase "extra-constitutional" in paragraph 4 is closest in meaning to:

(A) outside the rules of the constitution (B) supplementary (C) approved by treaty (D) judicial

解答: (A)

Q5（Factual Information）

According to paragraph 4, both Gracchi brothers:

(A) became dictators (B) were killed by political adversaries (C) introduced military reforms (D) lived to old age

解答: (B)

Q6（Rhetorical Purpose）

The author mentions Caesar's crossing of the Rubicon to:

(A) describe a famous geographical landmark (B) illustrate the culmination of escalating crises that led to outright civil war (C) compare it with naval battles (D) explain why senators welcomed Caesar

解答: (B)

Q7（Negative Factual Information）

All of the following are mentioned as factors in the Republic's collapse EXCEPT:

(A) military reforms producing armies loyal to commanders (B) wealth from conquered provinces (C) the rise of regional ethnic identities (D) precedent of political violence

解答: (C)

Q8（Sentence Simplification）

Which best expresses: "Political institutions designed for one set of social and economic conditions may prove unsuited to a transformed environment, however carefully their original architects designed them."

(A) Original designers always produce perfect institutions. (B) Even the most carefully designed institutions can become inadequate when underlying social and economic conditions change. (C) Institutions never need updating. (D) Modern institutions are always better than ancient ones.

解答: (B)

Q9（Inference）

The passage suggests that historians disagree about whether the Republic's collapse should be attributed primarily to:

(A) structural factors versus the choices of particular individuals (B) Roman religion (C) climate change (D) trade routes

解答: (A)

Q10（Prose Summary）

Select the THREE most important ideas:

(A) The Roman Republic's institutional balance preserved stability for centuries while Rome remained a city-state. (B) Imperial expansion produced military, economic, and political conditions that exceeded what the original constitutional design could constrain. (C) Roman emperors after Augustus were universally tyrannical. (D) A series of escalating crises—from the Gracchi to Caesar's civil wars—ended in the substitution of monarchy for republic. (E) Romans invented modern democracy. (F) Cicero personally caused the fall of the Republic.

解答: (A), (B), (D)

復習・進捗管理

学習サイクル

設問タイプ別正答率

| タイプ | 正答 / 出題 | 弱点メモ |
|---|---|---|
| Factual Information | / 12 | |
| Negative Factual Information | / 6 | |
| Inference | / 8 | |
| Rhetorical Purpose | / 6 | |
| Vocabulary | / 12 | |
| Reference | / 1 | |
| Sentence Simplification | / 5 | |
| Insert Text | / 4 | |
| Prose Summary | / 6 | |

TOEFL Reading 重要語彙 100（出現頻度高）

動詞

attribute / contend / yield / undermine / undergo / propagate / converge / diverge / accumulate / inhibit / exhibit / encompass / mitigate / preclude / span / curtail / amplify / saturate / discern / ascertain / concur / dispute / consolidate / disseminate / postulate

名詞

hypothesis / paradigm / consensus / inception / advent / phenomenon / mechanism / proximity / equilibrium / ramification / nuance / disparity / proximity / threshold / proliferation / convergence / divergence / synthesis / scrutiny / fluctuation / subsidiary / hierarchy / framework / criterion / spectrum

形容詞・副詞

ostensibly / arguably / inherently / pivotal / pervasive / corroborated / contentious / ubiquitous / robust / negligible / nominal / formidable / unprecedented / preeminent / paramount / pristine / contemporaneous / discrete / emergent / nuanced / latent / endemic / cardinal / invariably / thereby

接続表現

albeit / notwithstanding / contingent on / akin to / in lieu of / hence / thereby / inasmuch as / in tandem with / in conjunction with / by virtue of / vis-à-vis / on the contrary / by contrast / for instance

→ これらを 1 日 5 単語のペースで 4 週間で 100 語暗記。Reading 速度と Vocab 設問の正答率が劇的向上。

TOEFL Reading で時間切れしないコツ

1. 各段落 30秒で「役割（説明 / 反論 / 例示 / 結論）」を確定 → メモ
2. Vocabulary 問題は 20 秒以内（即決）
3. Insert Text は前後の論理関係詞 (however / therefore / also / for instance) を確認
4. Prose Summary は「一般 / 抽象 / 主旨を含む」3 文を選ぶ。詳細列挙的な選択肢を切る
5. 最後 1 分は Sentence Simplification や Inference の見直しに使う