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【题目】Detective Lu told us the victim was last seen _______ his office at about 7 p.m. yesterday.

A.leaveB.leftC.leavingD.to leave

【答案】C

【解析】

句意:陆侦探告诉我们,受害者最后一次被看到是在昨天晚上7点左右离开他的办公室。

考查现在分词作主语补足语。leave动词原形;left过去式和过去分词;leaving动名词,现在分词;to leave动词不定式;see sb. do 看见某人做某事,目睹了某人做某事的全过程;see sb. doing 看见某人正在做某事,它的语句环境是“主语对象”恰巧看到了某人正在实施某事,强调的是看见的这么一个动作,是一个瞬间发生的事情;根据“at about 7 p.m. yesterday”可知是那个时间发生的事情,所以用doing;结合“was last seen”可知是被动语态,所以此处是缺doing,故选C

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