영어 모의고사 (자동 편성)

Biodegradable plastics have been promoted as a promising 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 accelerate microbial breakdown once discarded. However, _______________. 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 low. In addition, when mixed with conventional plastics in recycling streams, they can contaminate 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 genuine potential requires not only technological refinement but also facilities capable of providing the precise conditions decomposition demands.

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. 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. Furthermore, the scarcity of vegetation in densely built areas removes a natural cooling mechanism, since plants lower temperatures by evaporating water from their leaves. To address this problem, urban planners _______________. 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. In contrast, some cities have pursued permeable pavements that let water seep through and evaporate, cooling nearby surfaces. Collectively, these strategies show that reducing urban heat depends on combining approaches suited to a city's geography.

Bacteria have been cutting up invading viral DNA for billions of years, long before any scientist thought to borrow the trick for use in a laboratory. The CRISPR-Cas9 system relies on a short guide RNA that matches a specific DNA sequence, _______________. Once Cas9 arrives at the target site, it slices both strands of the DNA helix, and the cell's own repair machinery rushes in to mend the cut, often introducing a small change in the process. By supplying the cell with a template during this repair step, scientists can direct that machinery to insert a specific new sequence rather than merely disabling the original gene. What once required years of painstaking work to alter a single gene can now be accomplished within days.

A biosensor works by pairing a biological component, such as an enzyme or antibody, with an electronic device that converts a biological reaction into a signal a computer can read. (A) Engineers are now racing to extend the same principle to detect subtler targets, from cancer cells circulating in the bloodstream to trace contaminants in drinking water, though the central challenge remains doing so reliably outside a controlled laboratory. (B) When the target molecule, whether glucose in blood or a trace of a pathogen, binds to the biological component, it triggers a small measurable change that the device translates into a readable number. (C) This design has already transformed diabetes management, letting patients monitor blood sugar continuously through a small sensor worn under the skin rather than pricking a finger several times a day.

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.

Symbolic interactionism approaches society not as a fixed structure imposed from above but as something continuously constructed through everyday face-to-face interaction, in which individuals interpret and respond to the symbolic meanings that objects, actions, and other people hold for them. (C) Erving Goffman extended this framework with his dramaturgical approach, comparing social life to a theatrical performance in which individuals manage impressions and present different faces in different settings. (B) Sociologist George Herbert Mead argued that the self itself emerges through this interactive process, as individuals learn to see themselves from the perspective of others. (A) Unlike structural theories that emphasize large institutions, symbolic interactionism focuses on the small, repeated exchanges through which shared meaning is negotiated.

People often recognize, in calm reflection, that their future selves will be tempted to abandon a goal they currently value. Rather than relying solely on willpower at the critical moment, they may choose to restrict their own future options in advance, a strategy known as precommitment. (A) What unites these examples is a simple insight: because future desires cannot always be trusted, the wisest moment to act may be now, while judgment remains clear and temptation has not yet taken hold. (B) By making certain choices costly, inconvenient, or impossible to reverse, individuals can protect a long-term goal from a short-term impulse that has not yet arisen. (C) A person hoping to save money might lock funds into an account that penalizes early withdrawal, removing the very temptation that would otherwise be difficult to resist. Similarly, someone determined to finish a project might publicly announce a deadline, transforming private intentions into a commitment that carries social consequences if broken.

That trajectory has continued to accelerate ever since, each new generation of vaccine technology arriving faster than the one before it. 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. ( ① ) 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. ( ② ) This method produced genuine successes, eventually eliminating smallpox worldwide and reducing diseases such as polio and measles. ( ③ ) Each new vaccine, however, still required years of laboratory work with no guarantee of success. ( ④ ) Advances in molecular biology eventually allowed researchers to isolate a single protein from a pathogen's surface rather than using the whole organism, producing vaccines with fewer side effects and a more predictable safety profile. ( ⑤ ) The most recent shift, toward delivering genetic instructions rather than proteins themselves, represents the latest chapter in a story that began with an eighteenth-century doctor's curiosity about a puzzling immunity among dairy workers.

The lining, weakened in this way, no longer functions as the tight barrier it is meant to be. The human gut hosts trillions of microorganisms whose combined genetic material outnumbers that of the human genome itself many times over. ( ① ) 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. ( ② ) A microbiome disrupted by antibiotics, poor diet, or chronic stress can leave the gut lining more permeable than it should be. ( ③ ) This allows substances to leak into the bloodstream that would normally stay contained. ( ④ ) Researchers studying this connection have found that transplanting gut bacteria from a healthy donor into a patient can, in some cases, relieve symptoms of certain digestive disorders that conventional medication had failed to treat. ( ⑤ ) 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.

These institutions frequently begin the process with what Goffman termed a mortification of self, removing personal possessions and erasing markers of prior status so that recruits can be rebuilt according to institutional expectations. Socialization is the lifelong process through which individuals absorb the norms, values, and roles that allow them to function within a society. ( ① ) Most of this process unfolds gradually and is barely noticed by the people experiencing it. ( ② ) Resocialization, by contrast, refers to a deliberate and often abrupt process in which an individual is stripped of a previous identity and trained to adopt a new set of norms, typically within what sociologist Erving Goffman called a total institution, such as a military academy, prison, or monastery. ( ③ ) While resocialization can help individuals adapt to demanding new roles, critics note that total institutions can also produce lasting psychological strain. ( ④ ) This strain often results from severing the very social ties that once anchored a person's sense of self. ( ⑤ )