He ______ be playing football now because he is in hospital.
A: can’t
B: mustn’t
C: don’t
D: didn’t
A: can’t
B: mustn’t
C: don’t
D: didn’t
举一反三
- He ______ be in the classroom because he was seen playing football on the play- ground. A: mustn't B: can't C: may not D: isn't able to
- I don't believe him. He ____ be serious. A: can't B: mustn't
- He must have lived a happy life a few years ago, ____he? A: didn’t B: hasn’t C: mustn’t D: can’t
- He must be in the library now, ____? A: doesn't he B: mustn't he C: needn't he D: isn't he
- “<br/>_____ he be watching TV now?” Yes, he _____ be watching TV<br/>now.” <br/>No, he _____ be watching TV now.” A: Must; can; mustn’t B: Can; must; can’t C: Must;<br/>must; can’t D: Can; can; mustn’t