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I have lost one of my gloves. I _____ it somewhere.

A. must drop                    B. must have dropped    

C. must be dropping              D. must have been dropped

B


解析:

由题干而知不用被动,排除选项D;题干说“已经丢了”,排除选项C;选项A“情态动词+动词原形”,表示对现在或将来的事情推测;选项B“情态动词+动词的完成时”表示的是对过去或已经发生的事情的推测判断,所以选B。  

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