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  3. The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name.

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name.

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问题     The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is 【B1】 to say it anyway. He is that 【B2】 bird, a scientist who works independently 【B3】 any institution. He helped popularize the idea that some diseases not 【B4】 thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.
    【B5】 he, however, might tremble at the 【B6】 of what he is about to do. Together with another two scientists, he is publishing a paper which not only 【B7】 that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in 【B8】 are a particular people originated from central Europe. The process is natural selection.
    This group generally do well in IQ test, 【B9】 12-15 points above the 【B10】 value of 100, and have contributed 【B11】 to the intellectual and cultural life of the West, as the 【B12】 of their elites, including several world-renowned scientists, 【B13】. They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts, 【B14】, have previously been thought unrelated. The former has been 【B15】 to social effects, such as a strong tradition of 【B16】 education. The latter was seen as a (an) 【B17】 of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately 【B18】. His argument is that the unusual history of these people has 【B19】 them to unique evolutionary pressures that have resulted in this 【B20】 state of affairs.
选项 A、selected
B、prepared
C、obliged
D、pleased
答案B
解析 考查动词搭配和语义。几个动词的被动语态都可以放在be+v-ed+to do结构中，但是语义不同。select表示"被挑选出来去…"；prepare表示"做好去…的准备"；oblige表示"被迫使去…"；please表示"非常荣幸去…"。语义参照点在文章第一句：很多理论不敢言明…。第二句开头的but提示本句与前面"不敢"的情况相反，只有prepare语义最为接近。
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