영어 모의고사 (자동 편성)

Over the past two decades, insights drawn from behavioral economics have moved beyond academic journals and into the machinery of government itself, ①reshaping how numerous public programs are designed and implemented. Tax authorities in several countries, for example, discovered that simply informing citizens how many of their neighbors had already paid overdue taxes on time substantially ②increased subsequent compliance rates, outperforming letters that merely threatened legal penalties for continued nonpayment. Public health agencies have applied similar principles to encourage preventive care, finding that appointment reminders phrased to emphasize the personal cost of a missed visit ③proved more effective than neutral reminders listing only the date and time. Employment offices redesigned job-seeking assistance programs around specific, actionable steps rather than general encouragement, discovering that participants who were asked ④to write down a concrete plan for the following week were considerably more likely to follow through than those who received only general advice. What unites these disparate interventions ⑤are a shared recognition that small, carefully tested adjustments to how choices are presented can produce measurable improvements in outcomes.

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.

A hamburger patty need not come from a slaughtered animal at all if a small sample of muscle cells can be ①discouraged to multiply inside a steel tank. Cultured meat begins with a biopsy of animal muscle tissue, from which scientists isolate cells capable of dividing repeatedly, then feed those cells a nutrient broth that supplies the sugars, proteins, and minerals an animal's bloodstream would ②normally provide. Inside a bioreactor, the cells multiply across scaffolding designed to encourage them to align into fibers, ③gradually 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 shrink the land, water, and greenhouse gas emissions ④associated with conventional meat production. Skeptics counter that producing the specialized broth at a large enough scale remains prohibitively ⑤expensive, meaning cultured meat is unlikely to compete with conventional meat in price until the technology matures considerably further.

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.

The human gut hosts trillions of microorganisms whose combined genetic material outnumbers that of the human genome itself many times over. Once dismissed as passive hitchhikers, these bacteria are now understood to actively shape digestion, regulate immune responses, and even influence the production of chemicals that affect mood and behavior. A microbiome disrupted by antibiotics, poor diet, or chronic stress can leave the gut lining more permeable than it should be, allowing substances to leak into the bloodstream that would normally stay contained. _______________. Still, scientists caution that the microbiome varies enormously between individuals, which means a treatment that restores balance in one person's gut may do little for someone else's.

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. 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. 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. _______________. 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 benefits that first made bioplastics appealing.

For patients born with a single faulty gene, the disease has traditionally been treated indirectly, managing symptoms for a lifetime rather than addressing the genetic error itself. Gene therapy attempts something more ambitious: delivering a corrected copy of the gene directly into a patient's cells, often using a disabled virus as a delivery vehicle. Once inside the nucleus, the corrected gene can begin producing the protein the patient's body had always lacked, in some cases reversing symptoms that medication alone had never been able to touch. Early trials were haunted by serious setbacks, including cases in which the delivery virus triggered a dangerous immune reaction or inserted the new gene in a location that disrupted other essential genes. _______________.

It is often assumed that memory operates independently of bodily context, yet research suggests that this assumption deserves reconsideration. When information is learned under a particular physiological or emotional condition, _______________, a phenomenon researchers call state-dependent memory. Individuals who study while mildly anxious, for instance, often recall material more accurately when tested under similarly anxious conditions than when tested while calm, even though calmness is typically considered more conducive to concentration. This finding should prompt educators to reconsider the assumption that a single optimal testing environment exists for every learner, since matching internal states across encoding and retrieval provides retrieval cues that a mismatched state cannot supply. Critics might argue that such effects are minor and inconsistent, yet accumulated evidence across pharmacological and emotional studies is difficult to dismiss. Policymakers designing assessments should therefore weigh not only content difficulty but also the physiological continuity between preparation and examination, since ignoring this dimension risks underestimating certain students' actual knowledge.

The ancient puzzle known as the ship of Theseus asks a deceptively simple question: if every plank of a wooden ship is replaced one by one over many years, is the vessel that eventually results still the same ship it once was? (A) Suppose a careful collector gathered every discarded plank and reassembled them into a second vessel, built exactly as the original once stood. (B) Two ships would then exist side by side, each with an equal claim to being the genuine one, and no obvious way to decide between them. (C) Most people's first instinct is to answer yes, since each individual replacement seems too small to erase the ship's identity, but the puzzle grows far sharper once a second twist is introduced.

Something has clearly gone wrong along the way, since no reasonable person would call one grain of sand a heap. Consider a large heap containing ten thousand grains of sand. ( ① ) Nearly everyone agrees that removing a single grain from such a heap leaves another heap behind; surely one grain could never make the difference between a heap and a non-heap. ( ② ) Yet if this principle is applied repeatedly, grain by grain, the heap eventually shrinks to a single lonely grain, or even to no grains at all. ( ③ ) Logic alone seems to force us to accept that this final result still counts as a heap. ( ④ ) Pinpointing exactly which single removal transformed a heap into a non-heap seems impossible. ( ⑤ ) The puzzle exposes a deep discomfort with vague terms like "heap," "tall," or "bald," concepts that seem to admit no sharp boundary yet are used confidently in everyday language.