题目内容
---Listen! It ______be Mr. White singing in the office.
---No. It _______be him. He left for London just now.
A. must; can’t B. may; mustn’t
C. can; can D. must; mustn’t
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题目内容
---Listen! It ______be Mr. White singing in the office.
---No. It _______be him. He left for London just now.
A. must; can’t B. may; mustn’t
C. can; can D. must; mustn’t