Today is Wednesday. He be at home. He be at school.A. cant; canB. cant; mustC. mustnt

问题补充：

Today is Wednesday. He be at home. He be at school.

A. can ; can

B. can ; must

C. mustn ; must

D. mustn ; can

答案：

A. can ; can

(答案→)B. can ; must

C. mustn ; must

D. mustn ; can

解析：can能，表示某种本能的客观的能力；must必须，一定；can’t不能，不可能，can的否定式；must’t禁止。句意：今天是星期三。不可能在家。他一定在学校。