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【题目】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:我丢了一只手套。我一定是掉到什么地方了。第一句中的时态为现在完成时,表示“掉一只手套” 已经发生过了。对于已经发生的事情的推测(可排除AC,表示现在的情况),应用“must + have done”结构,此处并无被动关系,故正确答案为B。

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