영어 모의고사 (자동 편성)

Devices that translate brain activity directly into digital commands have moved from laboratory experiments to real medical use, ①allowing paralyzed patients to control a robotic arm or type a message using thought alone. As the technology improves, some developers envision a future in which brain-computer interfaces extend beyond restoring lost function ②toward enhancing healthy minds, offering faster memory or expanded attention to anyone ③willing to undergo the procedure. This prospect raises a philosophical question that medicine alone cannot answer: if a device can alter memory, mood, or decision-making, at what point does the assistance stop ④being a tool and start reshaping the very identity of the person using it. Neuroethicists argue that mental privacy, the ability to keep one's own thoughts free from external access or manipulation, may need ⑤recognizing as a fundamental right before this technology becomes widespread.

Scientists have long searched for a way to describe, in a single coherent framework, the outer limits within ①which human activity can safely continue without destabilizing the planet's fundamental systems. The concept of planetary boundaries, ②introduced by earth-system researchers, identifies nine interconnected processes, including climate change, biodiversity loss, and nitrogen pollution, each ③possessing a threshold beyond which abrupt and irreversible change becomes likely. Unlike conventional environmental limits, often defined locally, these boundaries are framed at a planetary scale, ④reflecting the idea that the Earth functions as a single interdependent system rather than a collection of isolated regions. Crossing one boundary, proponents argue, does not merely damage the system involved but can also destabilize others, since climate, oceans, and land are bound together by feedback loops that transmit disturbance across the system. Some philosophers have likened this framework to a ship's safe operating margin, within which passengers may move freely without risking the vessel's stability. Critics, however, contend that the boundaries ⑤is drawn with more confidence than the data can support.

Social media platforms rarely show users a neutral stream of information. Instead, recommendation algorithms are optimized to maximize engagement, and content that provokes strong emotion tends to hold attention longer than balanced reporting ever could. Some platforms have experimented with reducing the visibility of outrage-driven content, only to see user engagement drop, which reveals _______________.

The scarcity effect operates with particular force when a deadline, rather than a fixed quantity, defines the limitation. (A) A countdown timer displayed beside an online offer, for instance, creates a constant visual reminder that the opportunity to purchase is steadily disappearing, prompting many shoppers to decide before they have fully considered the purchase. (B) Because the clock continues ticking regardless of the shopper's readiness, the pressure to act quickly can override the more deliberate evaluation that a purchase might otherwise receive. (C) Retailers have accordingly found that adding an explicit deadline, even an artificial one that resets shortly afterward, reliably increases the speed and frequency of purchase decisions.

As private companies develop the technology to mine asteroids for rare metals and water, a legal question once confined to science fiction has suddenly become urgent: who, if anyone, owns the resources of outer space? (A) Some governments have already passed domestic laws granting their own companies rights to material mined in space, a move other nations view as a unilateral attempt to settle a shared question. (B) Existing international treaties state that no nation may claim sovereignty over celestial bodies, but they say remarkably little about whether a private company may extract and sell what it finds there. (C) Supporters of space mining argue that new resources could ease shortages on Earth, while critics warn that treating space as an open frontier for extraction risks repeating past mistakes.

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) 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. (B) A circular economy proposes an alternative framework in which materials are kept in continuous use through reuse, repair, and recycling, 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. (C) 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.

Overconfidence bias is not confined to amateur investors; even seasoned financial professionals display strikingly similar patterns. (A) Fund managers surveyed about the accuracy of their own market predictions, for example, consistently rate their forecasts as more reliable than an objective analysis of their historical track record would support. (B) This gap between perceived and actual accuracy suggests that professional training and experience do not automatically immunize individuals against overconfidence. (C) Some researchers argue instead that professionals may be especially susceptible, since repeated exposure to a domain can breed a false sense of mastery over outcomes that remain fundamentally unpredictable.

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.

주어진 문장: As a result, the combined effect of heat-absorbing surfaces and limited greenery can raise nighttime temperatures in cities by several additional degrees. Cities are frequently several degrees warmer than the surrounding countryside, a phenomenon known as the urban heat island effect, which intensifies in summer and threatens public health. ① This disparity arises largely because asphalt and concrete absorb solar radiation during the day and slowly release it as heat throughout the night, preventing urban areas from cooling down. ② Furthermore, the scarcity of vegetation in densely built areas removes a natural cooling mechanism, since plants lower temperatures by evaporating water from their leaves. ③ To address this problem, urban planners have begun implementing mitigation strategies designed to lower surface and air temperatures. ④ One widely used solution involves reflective "cool" roofing engineered to reflect more sunlight than dark rooftops absorb. Another strategy, green infrastructure, incorporates rooftop gardens and tree-lined streets that provide shade while releasing moisture. ⑤ In contrast, some cities have pursued permeable pavements that let water seep through and evaporate, cooling nearby surfaces. ① ② ③ ④ ⑤

There is also a quieter cultural cost that rarely appears in productivity reports. Sensors buried in the soil now report moisture levels in real time, drones survey entire fields for signs of disease within minutes, and automated systems adjust irrigation without a farmer ever walking the rows. ( ① ) For large operations with the capital to invest, these tools have measurably increased yields while reducing water waste. ( ② ) Smaller family farms, however, often cannot afford the upfront cost of this equipment. ( ③ ) Some worry that the gap between high-tech and traditional operations will only widen as the technology advances further. ( ④ ) Generations of farming knowledge, passed down through direct observation of soil, weather, and crops, risk being replaced by dashboards and automated alerts. ( ⑤ )