题目内容
Mr Li was out of touch last week. The police _______ for him since.
A. have been searching B. were searching
C. had searched D. has searched
解析:选A。考查时态。句意:李先生上周就失去了联系。警察一直在找他。句中的since明确表明句子用现在完成进行时, 到现在还在继续寻找。故选A项。
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