Karl Von Linne (or Linnaeus, as he is widely known) was a Swedish biologist who devised the system of Latinised scientific names

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问题     Karl Von Linne (or Linnaeus, as he is widely known) was a Swedish biologist who devised the system of Latinised scientific names for living things that biologists use to this day. When he came to【C1】______people into his system, he put them into a group called Homo and Linne’s hairless fellow humans are still known biologically as Homo sapiens.【C2】______the group originally had a second member, Homo troglodytes. It lived in Africa, and the pictures show it to be covered【C3】______hair.
    Modern【C4】______are not as generous as Linne in welcoming other species into Man’s lofty 【C5】______, and the chimpanzee is now referred to【C6】______Pan troglodytes. But Pan or Homo, there is no【C7】______that chimps are humans’ nearest living relatives, and that if the secrets of what makes humanity special are ever to be【C8】______, understanding why chimps are not people, nor people chimps, is a crucial part of the process. That, in turn, means looking at the DNA of the two species,【C9】______it is here that the【C10】______must originate.
    One half of the puzzle has been【C11】______for several years: the human genome was published in 2001. The second has now been added, with the announcement in this week’s Nature【C12】______the chimpanzee genome has been sequenced as well. For those expecting【C13】______answers to age-old questions【C14】______, the publication of the chimp genome may be something of an【C15】______. There are no immediately obvious genes—present in one, but not the other—that account for such characteristic human【C16】______as intelligence or even hairlessness. And【C17】______there is a gene connected with language, known as FOXP2, it had already been discovered. But although the preliminary comparison of the two genomes【C18】______by the members of the Chimpanzee Sequencing and Analysis Consortium, the multinational team that generated the sequence, did not【C19】______any obvious nuggets of genetic gold, it does at least show where to look for【C20】______
【C20】

选项 A、him
B、it
C、them
D、her

答案C

解析 本题是一道词汇和语法题,考查代词“them”的正确指代和使用。本句的大意是:虽然初步的比较未能找到任何明显有价值的东西(nuggets),但是初步的比较的确至少指出到哪里去寻找这些有价值的东西(nuggets)。本题应当选择一个能够替代复数形式名词“nuggets”一词的代词。可见只有选项C“them”能够充当本题的正确答案。
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