Question

-Mum, must I do my homework now?

-No, you ________．You can do it after supper．

1. A.
   mustn't
2. B.
   can't
3. C.
   shouldn't
4. D.
   needn't

Answer 1

D
对must问句的否定回答，一般用needn't，“没有必要”。mustn't的语气较重“一定不要”。