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  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.
Unless the conservator can find a way to protect the photographs in the archives from light and air, these precious historical documents have deteriorated and will continue to do so both in color and in fine detail.
选项 A、have deteriorated and will continue to do so
B、win continue to deteriorate
C、have been and will continue to deteriorate
D、will continue to deteriorate, as they already have,
E、will be deteriorating yet more
答案B
解析 The sentence begins with "Unless," so the verb in the underlined passage should take the form "unless a happens, then b will happen." A, C, and D make statements declaring that the photographs have deteriorated in the past, but these statements are not warranted by the rest of the sentence. C and E properly suggest that unless conditions are changed, an ongoing process will continue; E, however, is worded in a very awkward way. B is the best choice.
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