영어 모의고사 (자동 편성)

Blockchain technology was originally promoted as a way ①to remove the need for trusted middlemen, allowing strangers to exchange value directly and verify transactions through a shared, tamper-resistant ledger rather than through a bank or government agency. In theory, this design ②distributes power away from any single institution and toward the network as a whole. In practice, however, a small number of large players have come to dominate many blockchain networks, ③controlled enough computing power or currency to influence outcomes that were supposed to be decided collectively. Critics note a further irony: when something goes wrong, there is often no institution left ④to appeal to, since the entire system was designed precisely to eliminate that kind of central authority. Whether decentralization can survive this concentration of power ⑤remains one of the technology's most unresolved questions.

For decades, memory researchers assumed that repetition alone ①determined how well information would be retained, an assumption that an influential theory proposed by Craik and Lockhart eventually overturned. According to their framework, what matters most is not how many times a person rehearses material but how deeply that material is processed during encoding. Shallow processing, which involves attending merely to superficial features such as the shape of letters or the sound of a word, produces memory traces that fade quickly and remain vulnerable to interference. Elaborative processing, by contrast, requires ②to connect new information to existing knowledge, generating meaningful associations, and analyzing semantic content, thereby ③producing traces that are considerably more durable. Consequently, a student who merely repeats a definition aloud without considering its implications ④is less likely to retain it than one who relates the concept to a personal example. This distinction reshaped educational practice, ⑤encouraging teachers to design tasks that demand comprehension rather than mechanical repetition, since durable memory depends on the depth, not the frequency, of cognitive engagement.

Imagine a brilliant scientist named Mary who has spent her entire life inside a black-and-white room, ①learning 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 complete physical knowledge, Mary herself has never actually ②seen 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 ③shown a ripe red tomato for the first time. Philosopher Frank Jackson argued that Mary would learn something entirely new at that moment, namely what it actually ④feeling 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 cannot ⑤capture everything there is to know about conscious experience.

Among the many strategies proposed to remove carbon dioxide from the atmosphere, one of the oldest draws on an agricultural technique predating modern industry, converting organic material into a ①stable form of charcoal known as biochar. Biochar is produced through pyrolysis, a process in which crop residues or wood chips are heated in an environment with little or no oxygen, preventing the material from burning away as in an open fire. This process leaves behind a carbon-rich solid that ②accelerates decomposition far longer than raw organic matter, locking carbon in a form remaining stable in soil for centuries. When mixed into farmland, biochar also improves soil structure, retaining moisture and nutrients otherwise lost, which can ③boost crop yields in depleted soils. For example, farmers cultivating nutrient-poor tropical soils have reported ④measurable increases in productivity after adding biochar. Nevertheless, researchers caution that the climate benefits of biochar depend on the feedstock and method used, since poorly managed pyrolysis can release as much carbon as it sequesters, ⑤undermining its own purpose.

The immune system produces an almost limitless variety of antibodies, each shaped to latch onto one particular molecular target with remarkable ①specificity. Monoclonal antibody drugs harness this natural precision by cloning a single antibody-producing cell in the laboratory, generating 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. Because the antibody binds only to its intended target, these drugs tend to spare healthy tissue far more ②effectively than traditional chemotherapy, which attacks any rapidly dividing cell regardless of whether it is cancerous. Manufacturing monoclonal antibodies remains far more ③complicated 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. This complexity keeps monoclonal antibody treatments considerably more ④expensive than most conventional drugs, a cost that continues to ⑤resolve debates over pricing and access.

Biodegradable plastics have been promoted as a ①promising solution to plastic waste, since they are designed to decompose into natural substances rather than persist for centuries. Manufacturers derive these materials from renewable resources such as corn starch, blending them with additives that ②accelerate microbial breakdown once discarded. However, their environmental benefits are often exaggerated, largely because decomposition depends on specific conditions rarely found outside industrial composting facilities. For example, a bag labeled biodegradable may take years, not the weeks advertised, to break down in a landfill or ocean, where temperature and microbial activity remain ③high. In addition, when mixed with conventional plastics in recycling streams, they can ④contaminate the process, weakening the quality of materials produced afterward. Some engineers therefore compare biodegradable plastics to a bridge that leads nowhere unless paired with infrastructure that completes the journey. Ultimately, realizing their ⑤genuine potential requires not only technological refinement but also facilities capable of providing the precise conditions decomposition demands.

Two drivers, equally distracted by their phones, run a red light in exactly the same careless manner. By pure chance, a child happens to be crossing the street in front of one driver but not the other; the first driver kills the child, while the second driver drives through safely and never even notices the danger. Although both drivers behaved identically and made exactly the same reckless choice, society judges them very differently: one faces criminal charges and lifelong guilt, while the other receives, at most, a minor traffic ticket. Philosophers call this troubling asymmetry moral luck, since factors entirely outside a person's control end up determining how severely we judge their moral character. If moral responsibility is supposed to depend only on what a person chooses and intends, this outcome seems deeply unfair, yet few people are willing to excuse the unlucky driver as if nothing worse had happened. Moral luck suggests that _______________.

Time travel to the past has long fascinated physicists and philosophers alike, but it also generates a famously troubling contradiction. Suppose a traveler journeyed backward in time and, through some combination of accident and intention, prevented their own grandfather from ever meeting their grandmother. If the grandfather never had children, the traveler themselves would never have been born, which means the traveler could never have existed to make the trip in the first place. Yet if the traveler never made the trip, the grandfather would have survived to meet the grandmother after all, allowing the traveler to be born and eventually travel back in time. The story therefore loops endlessly, undermining itself at every turn rather than settling into any stable outcome. Some physicists resolve the paradox by arguing that _______________.

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. Some policymakers initially treated internet access as a convenience, comparable to cable television, rather than as infrastructure essential to modern life. That assumption is increasingly being reconsidered, particularly as _______________. Closing this divide will require more than simply distributing devices.

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. 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. 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. 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, harming the very community whose rational members caused the collapse. Philosophers use this scenario to illustrate _______________.