2. 外语
  3. Research on animal intelligence always makes us wonder just how smart humans are. Consider the fruit-fly experiments described b

Research on animal intelligence always makes us wonder just how smart humans are. Consider the fruit-fly experiments described b

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问题     Research on animal intelligence always makes us wonder just how smart humans are. Consider the fruit-fly experiments described by Carl Zimmer in the Science Times. Fruit flies who were taught to be smarter than the average fruit fly【C1】______to live shorter lives. This suggests that dimmer bulbs burn longer, that there is a(n) 【C2】______in not being too bright.
    Intelligence, it turns out, is a high-priced【C3】______. It takes more upkeep, burns more fuel and is slow off the starting line because it depends on learning—a(n) 【C4】______process—instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to stop.
    Is there an adaptive value to limited intelligence? That’s the question behind this new research. Instead of casting a wistful glance【C5】______at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real costs of our own intelligence might be. This is on the【C6】______of every animal we’ve ever met.
    Research on animal intelligence also makes us wonder what experiments animals would【C7】______on humans if they had the chance. Every cat with an owner, for instance, is running a small-scale study in operant conditioning. We believe that if animals ran the labs, they would test us to【C8】______the limits of our patience, our faithfulness, our memory for locations. They would try to decide what intelligence in humans is really for, not【C9】______how much of it there is. Above all, they would hope to study a【C10】______question: Are humans actually aware of the world they live in? So far the results are inconclusive.
A)mind E)advantage I)aptly M)tended
B)fundamental F)happened J)overcome N)inclination
C)gradual G)spontaneous K)option O)perform
D)determine H)backward L)merely
【C3】
选项
答案K
解析 这里缺少名词，由high-priced修饰。根据后面的内容：它需要更好的保养、要燃烧更多的热量，而且起步慢……，词库中只有option“选择”在意思上符合。
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