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--The man in a black suit _______ be our youth worker.
--- I’m sure it _______ be him. I saw him in the laboratory building some minutes ago.

A.must; can’t B.can; mustn’t C.can; could D.must; won’t
科目 英语   题型 单选题   难度 中等
知识点: 情态动词的被动语态
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