영어 모의고사 (자동 편성)

A hamburger patty need not come from a slaughtered animal at all if a small sample of muscle cells ①can be persuaded to multiply inside a steel tank. Cultured meat begins with a biopsy of animal muscle tissue, from which scientists isolate cells ②capable of dividing repeatedly, then feed those cells a nutrient broth that supplies the sugars, proteins, and minerals an animal's bloodstream would normally provide. Inside a bioreactor, the cells multiply across scaffolding ③designed to encourage them to align into fibers, gradually thickening into something that begins to resemble muscle tissue rather than a shapeless clump of cells. Supporters argue that because the process never requires raising and slaughtering a whole animal, it could ④shrink the land, water, and greenhouse gas emissions associated with conventional meat production. Skeptics counter that producing the specialized broth at a large enough scale remains prohibitively expensive, meaning cultured meat is unlikely ⑤competing with conventional meat in price until the technology matures considerably further.

For decades, most vaccines worked by ①injecting a weakened or inactivated version of a pathogen, coaxing the immune system into recognizing an enemy it had never truly fought. mRNA vaccines take a fundamentally different route, ②delivering 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 foreign and ③builds 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 redesign the genetic instructions within weeks whenever a pathogen ④mutating, rather than starting the years-long process required for traditional vaccines. This speed, first proven on a global scale during a recent pandemic, has convinced many researchers that the same platform could eventually ⑤be adapted to fight diseases far beyond infectious illness, including certain cancers.

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.

Sociologist Mark Granovetter challenged a common assumption when he found that job seekers were more likely to hear about new opportunities from casual acquaintances than from close friends and family. This finding, published as the strength of weak ties, rests on a structural insight: close friends tend to belong to the same tight social circle and therefore already share most of the same information, whereas casual acquaintances typically move in different circles and can act as bridges to information a person would otherwise never encounter. Weak ties, precisely because they connect otherwise separate networks, _______________. Granovetter's insight has since been applied well beyond job searches, informing research on how innovations spread and how epidemics travel through a population.

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.

A plastic bag that fully decomposes within months rather than lingering for centuries sounds almost too convenient to be real, yet certain bioplastics on the market do exactly that under the right conditions. (A) Not every bioplastic biodegrades quickly, however, and some marketed as eco-friendly break down only in industrial composting facilities that reach conditions rarely found in a backyard compost heap or the open ocean. (B) Unlike conventional plastic, derived almost entirely from petroleum, many bioplastics are synthesized from renewable feedstocks such as corn starch or sugarcane, sometimes with the help of bacteria engineered to produce plastic-like polymers as a byproduct of their metabolism. (C) Critics point out that growing crops for bioplastic production can compete with food crops for farmland and water, which is why researchers are now exploring bioplastics made from agricultural waste and algae instead of dedicated crops.

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 )

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

Sociologist Howard Becker argued that this label often becomes what he called a master status, a single identity that overshadows every other trait a person has and shapes how others treat them from that point onward. Labeling theory approaches deviance not as a fixed property of certain acts, but as a social process created when powerful groups attach a negative label to a person's behavior. ( ① ) According to this view, nearly everyone breaks minor rules at some point, yet only some individuals are singled out, caught, and formally branded as delinquents, criminals, or troublemakers. ( ② ) Once labeled, an individual may find legitimate opportunities closing off, pushing them toward the very community of offenders that the label predicted they would join. ( ③ ) This process, sometimes called secondary deviance, illustrates how social reaction can produce the outcome it claims merely to describe. ( ④ ) Critics of harsh punitive policies frequently invoke labeling theory to argue that stigmatizing young offenders may entrench criminal identities rather than correct behavior. ( ⑤ )

Confined in this controlled setting, the organisms grow far faster than they ever would in the wild. Long before humans learned to drill for oil, microorganisms had already mastered the art of converting sunlight and carbon dioxide into stored chemical energy. ( ① ) Modern biofuel research borrows this ability, cultivating algae or engineered bacteria in large tanks. ( ② ) There, they can be coaxed into producing oils and sugars that can be refined into fuel usable in existing engines. ( ③ ) Unlike crops grown for corn-based ethanol, which compete directly with food production for arable land, many algae strains can thrive in shallow ponds, wastewater, or even coastal seawater unsuitable for conventional agriculture. ( ④ ) Engineers have also learned to tinker with the metabolic pathways of these organisms, boosting oil yield far beyond what any wild strain would naturally produce on its own. ( ⑤ ) Despite this progress, producing biofuel at a cost competitive with fossil fuel remains difficult, since harvesting and processing the organisms consumes a substantial share of the energy the fuel itself will eventually provide.