Jack_______ be at home because I saw him in the library just now.
A: can’t
B: may
C: must
D: mustn’t
A: can’t
B: may
C: must
D: mustn’t
举一反三
- She ______ be iii because I saw her playing tennis just now. A: can't B: couldn't C: mustn't D: may not
- – He___ be in the classroom, I think .—No, he ___ be in the classroom. I saw him go home a minute ago. A: can; may not B: must; may not C: may; can't D: may; mustn't
- He_____ upstairs because I saw him playing football on the playground just now. A: mustn’t be B: might not be C: can’t be D: should not be
- Mary _______ be at home. I saw her in the library just now. A: mustn’t B: needn’t C: shouldn’t D: can’t
- He________be in the library because I saw him on the playground just now.