— Mom, must I finish my homework now?

— No, you ______. You may have supper first.

A. mustn’t　　 　　　 B. needn’t 　　　 　 C. can’t

——Dad, must I finish my homework today?

——No, you         . You may do it tomorrow.

A．needn’t         B．mustn’t          C．don’t           D．won’t

–Must I finish my homework tonight?
-No, you______.

—Must I finish my homework today,Ms Liu?

—No,_______.

A.you mustn’t      B.you don’t have to      C.you can’t