Question

— May I do the homework tomorrow?
一 No, you______. You should hand in before class tomorrow

1. A.
   mustn't
2. B.
   needn't
3. C.
   couldn't

Answer 1

A
考查情態(tài)動詞。mustn't表示禁止，不準。Needn’t不必； couldn’t不能（過去）。