He be at home now because I saw him in the office just now.A. can’tB. mustn’tC. mayD. mus

问题补充：

He be at home now because I saw him in the office just now.

A. can’t

B. mustn’t

C. may

D. must

答案：

(答案→)A. can’t

B. mustn’t

C. may

D. must

解析：否定性推测一定要用can’t。