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

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 (1)_____ people into his system, he put them into a group called Ho mo—and Linne’s hairless fellow humans are still known biologically as Homo sapiens. (2)_____ the group originally had a second member, Homo troglodytes. It lived in Africa, and the pictures show it to be covered (3)_____ hair.
    Modern (4)_____ are not as generous as Linne in welcoming other species into Man’s lofty (5)_____, and the chimpanzee is now referred to (6)_____ Pan troglodytes. But Pan or Homo, there is no (7)_____ that chimps are humans’ nearest living relatives, and that if the secrets of what makes humanity special are ever to be (8)_____, 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, (9)_____ it is here that the (10)_____ must originate.
    One half of the puzzle has been (11)_____ for several years: the human genome was published in 2001. The second has now been added, with the announcement in this week’s Nature (12)_____ the chimpanzee genome has been sequenced as well. For those expecting (13)_____ answers to age-old questions (14)_____, the publication of the chimp genome may be something of an (15)_____ There are no immediately obvious genes—present in one, but not the other—that account for such characteristic human (16)_____ as intelligence or even hairlessness. And (17)_____ there is a gene connected with language, known as FOXP2, it had already been discovered. But although the preliminary comparison of the two genomes (18)_____ by the members of the Chimpanzee Sequencing and Analysis Consortium, the multinational team that generated the sequence, did not (19)_____ any obvious nuggets of genetic gold, it does at least show where to look for (20)_____.

选项 A、while
B、once
C、when
D、as if
答案A
解析 while虽然，尽管、once一旦、when当…时候、as if仿佛，好像。本题是一道词汇题，考查连词"while"(虽然、尽管)的正确使用。本题所在句逗号前后两部分的时态差异暗示：本句逗号前后两个部分存在着一种让步转折关系，故只有选项"while"才能充当本题的正确答案。该句的含义是：尽管有与语言相关的基因，但是这一基因早已经被人们发现。
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