【題目】I have lost one of my gloves. I ________ somewhere.

A. must drop B. must have dropped C. must be dropping D. must have been dropped

【答案】B

【解析】句意:我丟了一只手套。我一定是掉到什么地方了。第一句中的時態(tài)為現(xiàn)在完成時,表示“掉一只手套” 已經(jīng)發(fā)生過了。對于已經(jīng)發(fā)生的事情的推測(可排除AC,表示現(xiàn)在的情況),應用“must + have done”結構,此處并無被動關系,故正確答案為B。

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