영어 모의고사 (자동 편성)

A single fertilized egg eventually ①gives rise to every cell type in the human body, from neurons to bone, a feat that has fascinated biologists for more than a century. Embryonic stem cells retain much of that original versatility, capable in principle of ②develop into almost any tissue, which is why researchers have long viewed them as a promising raw material for repairing damaged organs. Because harvesting these cells traditionally required ③destroying a human embryo, the research provoked ethical objections fierce enough to slow funding and legislation in several countries for years. A breakthrough arrived when scientists discovered that ordinary adult skin cells could be ④reprogrammed, through the introduction of a handful of specific genes, into a state resembling embryonic versatility without ever touching an embryo. These induced pluripotent cells have not entirely erased the ethical debate, but they have opened a path for stem cell research that far more scientists and funding agencies are willing ⑤to support.

Social unrest does not always emerge from the poorest conditions; it frequently erupts when circumstances ①are improving but not quickly enough to satisfy rising expectations. This paradox lies at the heart of relative deprivation theory, which ②holds that discontent arises less from objective hardship than from a perceived gap between what people expect and what they actually receive. Political scientist Ted Gurr illustrated the pattern with what is often called the J-curve: revolutions tend to follow a period of sustained improvement that is then followed by a sudden reversal, ③left citizens who had grown accustomed to progress feeling suddenly cheated of gains they had come to regard as their due. Because the theory centers on perception rather than raw statistics, it helps explain why relatively prosperous societies can experience intense protest while societies ④mired in long-standing poverty sometimes remain comparatively quiet, ⑤having adjusted their expectations to match a bleak and unchanging reality.

Economists traditionally measured a community's wealth in terms of factories, income, or infrastructure, yet sociologists increasingly point to a less visible resource: social capital, the networks of trust and reciprocity ①that allow people to cooperate for mutual benefit. Robert Putnam popularized the concept by ②documenting a decline in civic participation, noting that fewer Americans joined bowling leagues, parent associations, or local clubs even as bowling itself remained popular, a trend he ③captured in the phrase bowling alone. Communities rich in social capital tend to enjoy lower crime and more effective local government, because neighbors ④who know and trust one another can coordinate informally without relying entirely on formal institutions. However, social capital is not uniformly beneficial; tightly bonded networks can also exclude outsiders and ⑤reinforcing existing inequality.

When people evaluate their personal contribution to water scarcity, they often consider only the water that flows directly from household taps, overlooking a far larger quantity consumed indirectly through the goods they purchase. The water footprint, a concept that extends this ①broad view, measures the total volume of freshwater used to produce the goods and services an individual or a nation consumes. Central to this concept is the notion of virtual water, the water embedded ②invisibly within a product, from irrigating cotton fields to livestock raised for meat. For instance, producing a kilogram of beef can require several thousand liters of water, whereas a kilogram of vegetables typically demands a fraction of that amount. Nations that import water-intensive goods rather than producing them domestically are importing virtual water from regions that may face ③severe shortages. Critics caution, however, that focusing ④exclusively on aggregate volume can mislead policymakers, since a liter of water drawn from a region suffering drought carries far greater consequences than one drawn from a water-⑤abundant area.

German sociologist Georg Simmel argued that the psychological experience of city life differs fundamentally from life in small towns, primarily because urban residents are ①bombarded with a much greater volume of stimuli than the human nervous system evolved to process. To cope with this constant sensory overload, Simmel proposed, city dwellers develop what he called a blasé attitude, a protective indifference in which individuals mentally ②sharpen their emotional reaction to the surrounding crowd, treating most encounters with calculated detachment rather than genuine engagement. This detachment, while sometimes criticized as cold or impersonal, also grants urban residents a distinctive ③freedom, since so few people know or judge them personally. Simmel therefore viewed anonymity as a ④double-edged feature of modern life, one that isolates individuals from deep communal bonds while simultaneously ⑤liberating them from the constant surveillance of small-town social life.

For decades, most vaccines worked by injecting a ①weakened or inactivated version of a pathogen, coaxing the immune system into recognizing an enemy it had never truly fought. mRNA vaccines take a fundamentally ②different route, delivering only a short genetic instruction wrapped in a protective lipid capsule, one that tells the body's own cells how to manufacture a single harmless piece of a virus's outer surface protein. Once those cells display the fragment, the immune system learns to recognize it as ③foreign and builds a defense, without ever having encountered the actual pathogen. Because the vaccine contains no live virus and cannot alter a cell's own DNA, developers can ④redesign the genetic instructions within weeks whenever a pathogen mutates, rather than starting the years-long process required for traditional vaccines. This speed has convinced many researchers that the same platform could eventually be adapted to fight diseases far beyond infectious illness, ⑤excluding certain cancers.

Imagine a brilliant scientist named Mary who has spent her entire life inside a black-and-white room, learning everything physical science could ever teach about color, including the exact wavelengths of light and the precise neural processes triggered when a person sees red. Despite this ①complete physical knowledge, Mary herself has never actually seen a color; every book, screen, and object in her world has been carefully restricted to shades of gray. Suppose that one day Mary is finally released from the room and shown a ripe red tomato for the first time. Philosopher Frank Jackson argued that Mary would learn something entirely ②new at that moment, namely what it actually feels like to see red, even though she already possessed every physical fact about color there was to know beforehand. If Mary genuinely gains new knowledge upon leaving the room, then physical facts alone ③cannot capture everything there is to know about conscious experience, ④confirming that something was indeed missing from her exhaustive scientific education all along, a conclusion that some physicalists find entirely ⑤unsurprising.

When consumers compare two products and assume that the one labeled "eco-friendly" is automatically the more ①sustainable choice, they often overlook the complexity involved in verifying such a claim. Life cycle assessment, commonly abbreviated as LCA, is a systematic method developed to evaluate the environmental impact of a product across every stage of its existence. By tracing a product from its origin to its disposal, this approach reveals impacts that might otherwise remain ②hidden from consumers who see only the finished item on a shelf. For example, an electric vehicle may produce no emissions while being driven, yet the mining of metals for its battery can generate ③substantial environmental costs elsewhere. Without accounting for these earlier stages, a ④superficial comparison could mistakenly present the vehicle as entirely emission-free. Therefore, researchers increasingly rely on life cycle assessment to make ⑤uninformed decisions rather than trusting labels alone.

Social mobility refers to the movement of individuals or families between different positions within a society's system of stratification, whether upward, downward, or sideways. A society is often judged by how much intergenerational mobility it permits, since high mobility suggests that outcomes depend more on effort and ability than on the accident of birth. Structural mobility, caused by large-scale economic shifts, must be distinguished from individual mobility, which results from a single person's particular choices. Research across many nations has found that education functions as the primary channel of upward mobility, yet access to quality education is itself unevenly distributed, meaning that _______________.

This puzzling inconsistency is not, as it turns out, a matter of chance. Two patients diagnosed with the same disease and prescribed the same medication can respond in strikingly different ways, one recovering quickly while the other experiences little benefit or even harmful side effects. ( ① ) Precision medicine starts from the observation that this variation often traces back to differences buried in each patient's genome. ( ② ) These differences determine how efficiently a body absorbs, breaks down, or responds to a given drug. ( ③ ) By sequencing a patient's DNA before treatment begins, doctors can increasingly predict which medication is likely to work best and at what dose, replacing a strategy once described as one-size-fits-all with something closer to a tailored fit. ( ④ ) This approach has proven especially valuable in cancer treatment, where tumors from two patients with the same diagnosis may carry entirely different genetic mutations that respond to entirely different drugs. ( ⑤ ) Widespread adoption still faces real obstacles, since genetic sequencing remains expensive in many regions and few doctors have been trained to interpret the flood of genetic data such tests now produce.