영어 모의고사 (자동 편성)

A cluster of neurons smaller than a pea can now spontaneously organize itself into layered structures that ①mimic, in miniature, the architecture of a developing human brain. Grown from stem cells coaxed to follow the same developmental cues that guide an embryo, these brain organoids have begun firing electrical signals in patterns that ②sharply resemble the activity recorded in an infant's brain. For researchers studying disorders such as autism or schizophrenia, this offers something long unavailable: a living model of human brain development that can be observed and manipulated directly, without ever touching an actual patient. Because organoids lack sensory organs, a body, or any connection to the outside world, most neuroscientists argue that the structures ③cannot generate anything resembling subjective experience, however brain-like their electrical activity may appear. Even so, the pace at which these organoids are growing more ④complex has convinced some ethicists that the field would benefit from establishing clear ⑤boundaries now, before the science outruns the conversation about what it means.

When people encounter an individual who appears to memorize enormous quantities of specialized information ①effortlessly, they often assume that person possesses an innate gift. Cognitive psychologists, however, contend that such feats ②rarely stem from raw talent alone. Instead, such feats arise from a learned skill known as chunking, whereby scattered pieces of information are consolidated into larger, meaningful units. A landmark study of chess players demonstrated this principle. When shown a board arranged according to plausible game positions, grandmasters reproduced the layout perfectly. Yet when the same pieces were scattered randomly, their performance ③collapsed to the level of novices. This pattern reveals that expert memory is not larger in raw capacity but is instead organized around patterns accumulated through years of deliberate practice. If chunking, rather than innate aptitude, ④contradicts expert performance, then educators should stop treating talent as fixed and destiny-bound. Curricula ought to be redesigned to cultivate pattern recognition explicitly, since doing so would grant far more students access to expertise once ⑤presumed reserved for the naturally gifted.

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 ①rarely do that under the right conditions. 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 ②byproduct of their metabolism. Not every bioplastic biodegrades quickly, however, and some marketed as eco-friendly break down only in industrial composting facilities that reach conditions ③rarely found in a backyard compost heap or the open ocean. Critics point out that growing crops for bioplastic production can compete with food crops for farmland and water, complicating the assumption that a biological origin automatically makes a material more ④sustainable. Researchers are now exploring bioplastics made from agricultural waste and algae instead of dedicated crops, hoping to sidestep this competition for land while preserving the ⑤benefits that first made bioplastics appealing.

Among the many tools available to those who design choice environments, few are as quietly powerful as the default option, the alternative that takes effect automatically unless a person actively selects something else. Because changing a default requires deliberate effort, many individuals simply accept whatever arrangement has been preselected for them. Designers of public policy and digital platforms alike have consequently come to recognize that setting a thoughtful default can achieve outcomes that ___________ often struggle to accomplish through persuasion or financial incentive alone.

Marketers have long recognized that perceived scarcity can dramatically increase a product's desirability, even when the item's intrinsic qualities remain entirely unchanged. A retailer who labels a product as "limited edition" or displays a countdown timer beside a discounted offer prompts customers to make hurried purchase decisions they might otherwise postpone or reconsider. Consumers who later reflect calmly on such purchases frequently discover that the item's actual usefulness fell well short of the ___________ they experienced at the moment of decision.

When a country physician named Edward Jenner noticed that milkmaids who had caught cowpox seemed immune to smallpox, he set in motion a medical revolution without fully understanding why it worked. (A) This method produced genuine successes, eventually eliminating smallpox worldwide and reducing diseases such as polio and measles, but each new vaccine still required years of laboratory work with no guarantee of success. (B) Advances in molecular biology eventually allowed researchers to isolate a single protein from a pathogen's surface, producing vaccines with fewer side effects, and the most recent shift toward delivering genetic instructions represents the latest chapter in this story. (C) For nearly two centuries afterward, vaccine development proceeded largely by trial and error, weakening or killing a pathogen and testing whether the resulting preparation could train the immune system without causing disease itself.

For decades, most vaccines worked by injecting a weakened or inactivated version of a pathogen, coaxing the immune system into recognizing an enemy it had never truly fought. (A) mRNA vaccines take a fundamentally different 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. (B) Once those cells display the fragment, the immune system learns to recognize it as foreign and builds a defense, without ever having encountered the actual pathogen. (C) 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 mutates, a speed that has convinced many researchers the same platform could eventually fight diseases far beyond infectious illness.

Consider a village green shared freely by every herder in the community, where each individual may graze as many animals as they wish without paying any fee. (A) The cost of the additional grazing, however, is spread thinly across every herder who uses the green, so no single individual bears more than a tiny fraction of the damage. (B) From the perspective of any single herder, adding one more animal to the shared pasture brings a clear personal benefit, since the extra income belongs entirely to that herder alone. (C) Because this calculation favors adding more animals for every rational herder, the shared pasture is gradually overgrazed until it can no longer support any animals at all.

As more schools shift toward digital textbooks and online assignments, a student without reliable internet access at home faces a disadvantage that has little to do with talent or effort. (A) That assumption is increasingly being reconsidered, particularly as more essential services, from job applications to medical appointments, move online by default. (B) Some policymakers initially treated internet access as a convenience, comparable to cable television, rather than as infrastructure essential to modern life. (C) Closing this divide will require more than simply distributing devices; it will demand sustained investment in the physical networks that carry information into every home.

주어진 문장: This asymmetry alone can be enough to prevent an otherwise reasonable deal from ever being reached. Picture a woman who receives a plain ceramic mug as a free gift at a conference and, later that afternoon, refuses to sell it for anything less than triple its price in the gift shop downstairs. ( ① ) Before she owned the mug, she would never have paid extra for it; once it became hers, however, its value in her mind rose sharply, simply because she now possessed it. ( ② ) Researchers have repeatedly observed this pattern across many everyday objects, from coffee mugs and concert tickets to office chairs and old furniture inherited from relatives. ( ③ ) Owners consistently demand more money to give something up than buyers are willing to offer for that very same item, revealing a curious asymmetry rooted purely in possession itself. ( ④ ) Some economists argue that this effect explains why negotiations over inherited property so often collapse, since each side quietly attaches a different value to what it currently holds. ( ⑤ ) Understanding this bias, therefore, helps explain why simply owning something, even briefly, can distort how fairly people judge its true worth.