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    精英家教网 > 高中英语 > 题目详情
    I have lost one of my gloves. I _____ it somewhere.
    A．must dropB．must have dropped
    C．must be droppingD．must have been dropped
    B
    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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