영어 모의고사 (자동 편성)

Long before cognitive scientists possessed the tools to observe the brain directly, Donald Broadbent proposed an influential model suggesting that the human capacity to process incoming sensory information ①constrained by a structural bottleneck through which only a single stream of input can pass at any given instant. According to this filter theory, multiple channels of stimulation, such as competing voices in a crowded room, ②are initially registered at a shallow, physical level, but only one channel is selected for further, meaning-based analysis while the rest are blocked from advancing beyond that early filter. Although later researchers challenged the rigidity of this early selection mechanism, ③pointing to instances in which unattended information, such as one's own name, nevertheless ④breaks through and captures awareness, the core insight that attention imposes a genuine processing limit rather than a mere matter of willpower has remained remarkably durable. This basic bottleneck principle ⑤continues to inform contemporary explanations of why multitasking so reliably degrades performance on demanding tasks.

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.

When sociologist Émile Durkheim studied suicide rates across different societies, he noticed something ①puzzling: rates rose not only during economic depression but also during sudden prosperity. He concluded that both crises share a common feature, the ②collapse of shared norms that once told individuals what to expect and how to behave. Durkheim called this state of normlessness anomie, arguing that rapid social change can ③strengthen the moral guidelines that regulate human desire, leaving individuals disoriented even when material conditions improve. Decades later, Robert Merton extended the concept to explain deviance within stable societies, proposing that anomie also arises when a culture insists that everyone pursue ④identical goals, such as wealth, while denying many people the legitimate means to achieve them. Anomie theory therefore suggests that crime is less a product of individual failure than of ⑤structural imbalance within society itself.

A liver no longer has to sit inside a human body to be studied ①closely. By coaxing stem cells to organize themselves within a nutrient-rich gel, scientists can now grow ②miniature three-dimensional structures called organoids, which reproduce much of the architecture and function of a real organ despite being no larger than a grain of rice. Unlike flat cultures grown on a plastic dish, which ③preserve many of the cues that guide normal development, organoids let cells interact in three dimensions much as they would inside the body, yielding tissue that behaves in strikingly ④realistic ways. This fidelity has made organoids invaluable for testing how a drug affects human tissue before any patient is exposed, sparing researchers much of the ⑤burden of relying on animal models alone.

Suppose a mad scientist removed a living brain from its body, placed it in a vat of nutrient fluid, and connected its neurons to a supercomputer capable of generating perfectly ①unrealistic sensations. The brain would experience a full and convincing world, complete with a sky, a body, and other people, without ever suspecting that none of it existed outside the simulation. This scenario, unsettling as it sounds, raises a genuinely difficult question for anyone confident in their own perception: how could a person ever ②prove that they are not that very brain right now? Ordinary evidence cannot help, since any proof gathered through the senses would itself be ③generated by the same simulation being tested. Some philosophers conclude that absolute certainty about the external world is simply ④unattainable, while others argue that the mere possibility of deception, however vivid, is not sufficient reason to ⑤abandon our everyday trust in what we perceive.

Traditional industrial systems have relied on a linear model of production, in which raw materials are extracted, transformed into goods, and eventually discarded as waste. This approach treats natural resources as if unlimited and disposal as if costless. A circular economy proposes an alternative framework in which _______________, thereby reducing the extraction of virgin resources. Central to this model is the notion that waste, rather than being an inevitable byproduct, can be redesigned as a resource for another process, much as fallen leaves nourish the trees that shed them. For example, manufacturers design products so that components can be disassembled and reused in new items once their original function ends. Some companies also lease equipment instead of selling it outright, retaining responsibility for refurbishment. Because such practices lessen dependence on finite raw materials, they reduce the environmental damage caused by mining. Consequently, the circular economy is increasingly regarded as a viable economic strategy that conserves resources for future generations.

Rewilding, a conservation strategy that seeks to restore natural processes with minimal human interference, has gained attention as traditional conservation struggles to halt biodiversity loss. Rather than managing landscapes according to a fixed blueprint, rewilding projects often reintroduce key species, such as large predators, whose presence can trigger cascading effects. Advocates point to the reintroduction of wolves in certain parks, where predation altered grazing behavior, allowing riverside vegetation to recover and stabilizing soil that had long been eroding. Skeptics, however, warn that rewilding can provoke serious conflict with nearby communities, particularly when predators prey on livestock or restored habitats limit land for agriculture. Moreover, critics argue that restoring landscapes to an imagined pristine state is scientifically dubious, since ecosystems have long been shaped by human activity. Compensation programs reimbursing farmers for livestock losses, alongside ecotourism initiatives creating local income, have proven essential to sustaining public support. Ultimately, _______________.

Every time an antibiotic kills off a population of bacteria, a handful of cells carrying a random mutation that resists the drug are left behind to multiply without competition. (A) Repeated over decades, across hospitals, farms, and households worldwide, this simple process of natural selection has produced strains of bacteria that survive treatments once considered reliably effective. (B) The pharmaceutical industry, meanwhile, has slowed the pace at which new antibiotics reach the market, since a drug meant to be taken for only a week or two rarely earns back the enormous cost of developing it. (C) Researchers are therefore searching in unconventional places, screening soil microbes and even genetic databases for new molecules, and some have also revived an older approach using viruses that infect only bacteria to hunt down resistant strains.

Every one of those clones, remarkably, is a perfect genetic copy of the original. The immune system produces an almost limitless variety of antibodies, each shaped to latch onto one particular molecular target with remarkable specificity. ( ① ) Monoclonal antibody drugs harness this natural precision by cloning a single antibody-producing cell in the laboratory. ( ② ) The result is an army of identical antibodies built to recognize one target, such as a protein on a cancer cell or a molecule driving an autoimmune disease. ( ③ ) Because the antibody binds only to its intended target, these drugs tend to spare healthy tissue far more effectively than traditional chemotherapy, which attacks any rapidly dividing cell regardless of whether it is cancerous. ( ④ ) Manufacturing monoclonal antibodies remains far more complicated than producing a conventional small-molecule pill, since living cells must be cultivated in carefully controlled bioreactors for weeks before the antibody can be purified and prepared for use. ( ⑤ ) This complexity keeps monoclonal antibody treatments considerably more expensive than most conventional drugs, a cost that continues to shape debates over pricing and access.

This divergence produces what is commonly called a generational gap, most visible when older members of a household interpret a younger relative's habits, such as constant online communication, as a rejection of tradition rather than a rational adaptation to a genuinely different social environment. Sociologist Karl Mannheim argued that individuals who come of age during the same historical period tend to share a distinctive outlook shaped by the events, technologies, and crises that defined their formative years, a phenomenon he called a generational unit. ( ① ) Because each generation absorbs its foundational assumptions during adolescence and early adulthood, when identity is still forming, later generations raised amid different circumstances often develop noticeably different values regarding work, authority, and communication, even within the same family. ( ② ) Mannheim cautioned against viewing either generation as simply right or wrong. ( ③ ) He insisted instead that each generation's worldview reflects a coherent response to the particular historical conditions it encountered. ( ④ ) These conditions inevitably differ from those faced by earlier and later generations. ( ⑤ )