2. 外语
  3. The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find fiv

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find fiv

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问题 The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
   These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
Nile perch, voracious predators that will eat anything smaller than themselves, are natives of northern Africa but were introduced to Tanzania’s Lake Victoria in a foolhardy attempt during the 1960s of boosting the local sport-fishing industry; since their introduction, these sturdy fish have decimated most other aquatic species in the lake.
选项 A、are natives of northern Africa but were introduced to Tanzania’s Lake Victoria in a foolhardy attempt during the 1960s of boosting
B、are native in northern Africa but were introduced to Tanzania’s Lake Victoria during the 1960s as foolhardy attempts to boost
C、are native to northern Africa but were introduced to Tanzania’s Lake Victoria during the 1960s in a foolhardy attempt to boost
D、had been native to northern Africa but during the 1960s were introduced to Tanzania’s Lake Victoria in a foolhardy attempt to boost
E、are native to northern Africa but were introduced to Tanzania’s Lake Victoria as a foolhardy attempt of boosting
答案C
解析 A in stating that the Nile perch in Lake Victoria "are natives of northern Africa," could be read to imply that the fish currently there are personally natives of northern Africa, which based on the timeline in question is almost certainly untrue; also "attempt... of boosting" is less idiomatic than "attempt... to boost." In B, "native in" is unidiomatic, and it implies that the fish themselves are "foolhardy attempts," rather than the introduction of the fish. D, by using the past perfect "had been native," implies that the fish is no longer native, which seems unlikely given that it is a "sturdy fish." E, like B, identifies the fish rather than the introduction as "a foolhardy attempt." C is the clearest and most idiomatic answer.
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