All reference books ________, he didn"t find the key to the question.A.being se
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All reference books ________, he didn"t find the key to the question.A.being searched | B.searched | C.to be searched | D.were searched |
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答案
B |
解析
B考察非谓语动词。句义:所有的参考书都查遍了,他还是没有找到问题的答案。该句中的,reference books与search之间构成被动关系,而且表示动作已经完成,使用过去分词做状语。故B正确。 |
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