---Themaninablacksuit

问题详情：

---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

【回答】

A

知识点：情态动词

题型：选择题