2026 수능특강 영어 18강 변형문제

People ____ assume that synthetic food ingredients are more harmful than natural ones, but this is not always the case.

Typically, synthetic ingredients can be made in a precisely controlled fashion ____ have well-defined compositions and properties, allowing careful evaluation of their potential toxicity.

On the other hand, natural ingredients often vary ____ in their composition and properties depending on their origin, the time of year they were harvested, the climate they experienced throughout their lifetime, the soil quality, and how they were isolated and stored.

These variations can make testing their safety extremely difficult — one is never ____ about the potential toxicity of minor components that may vary from time to time.

In some cases, a natural food component has ____ consumed for hundreds or thousands of years without causing any obvious health problems and can, therefore, be assumed to be safe.

____ one must still be very careful.

The controllability of the production process for synthetic food ingredients ____ the variability of natural food ingredients may challenge people’s commonly held assumption that the natural ingredients are more secure.

____ the worst times for labor have been those characterized by both worker-replacing technological change and slow productivity growth.

If AI technologies turn out to ____ as brilliant as some of us think, we should be more optimistic about the long run.

As Daron Acemoglu and Pascual Restrepo have pointed out, brilliant technologies are much preferable for labor to mediocre ones because as they make us richer, they create more ____ for other goods and services produced by humans.

Indeed, wages grew faster between 1995 and 2000, when computers prompted a ____ productivity boom, than in the preceding and succeeding years.

But while high productivity growth is always preferable to slow growth, growth in wages may fall behind that in ____ if technology is of the replacing sort, and some workers might see their incomes vanish in the process — even as new jobs are created elsewhere in the economy.

____ is what has happened in recent years, and it is also what happened during the classic years of industrialization.

Technological advancements ____ benefit workers in the long run by increasing the demand for goods and services, but if this is a substitution for human labor as it has ever been, some people may lose their jobs even though new jobs are created.

The basic reason for the increasing opportunity cost is that some resources and skills cannot be easily adapted from their current uses to alternative ____

And, the more you produce of one good, the more you are forced to employ inputs that are relatively more suitable for ____ other goods.

For example, at low ____ of food output, additional increases in food output can be obtained easily by switching relatively low-skilled carpenters from making shelters to producing food.

However, to get even ____ food output, workers who are less well suited or appropriate for producing food (i.e., they are better adapted to making shelters) must be released from shelter making to increase food output.

____ example, a skilled carpenter may be an expert at making shelters but a very bad farmer because he lacks the training and skills necessary in that occupation.

So using the ____ carpenter to farm results in a relatively greater opportunity cost than using the unskilled carpenter to farm.

The production of additional units of food becomes increasingly costly as progressively lower-skilled ____ (but good carpenters) convert to farming.

Opportunity cost increases when it’s challenging to shift ____ and skills to new uses, and producing more of a good requires using inputs that are more appropriate for other goods.

As farming societies grew more productive and captured more energy from their environments, ____ appeared to be scarcer and people had to work harder to meet their basic needs.

This was because, up until the Industrial Revolution, any gains in productivity farming peoples generated as a result of working harder, adopting new technologies, techniques, or crops, or acquiring new land were always soon consumed ____ populations that quickly grew to numbers that could not be sustained.

As a result, while agricultural societies continued to expand, prosperity was usually only ever ____ and scarcity evolved from an occasional inconvenience that foragers endured every once in a while to a near perennial problem.

In many respects, the hundreds of generations of farmers who lived before the fossil-fuel revolution paid for our extended lifespans and expanded waistlines now by enduring lives that were mostly shorter, gloomier, and harder ____ ours, and almost certainly tougher than those of their foraging ancestors.

Farmers before the fossil-fuel revolution experienced greater difficulties than their foraging ancestors and modern people because population growth ____ the benefits of agricultural productivity.

Contrary to common sense, memory and imagination may not be two independent ____ our memory clearly relies on constructive processes that are sometimes prone to error and distortion.

Daniel Schacter, a ____ at Harvard University, named this aspect of memory constructive memory:

“When we remember, we piece together fragments ____ stored information under the influence of our current knowledge, attitudes, and beliefs.”

Imagination is also a process of piecing together fragments ____ stored information.

If so, it would be more efficient for the brain to share ____ common constructive process for memory and imagination rather than maintaining two independent processes.

From this perspective, it would not be surprising to learn ____ the hippocampus is involved in both memory and imagination.

Although it is not favorable for remembering an event precisely as it happened, it is adaptive in that it “enables past information to be used flexibly in simulating alternative ____ scenarios without engaging in actual behaviors.”

Memory ____ imagination rely on constructive processes in which the brain adjusts past information and models potential future events, suggesting they might not be separate processes since both involve the hippocampus.