—Must I finish the exercise this afternoon?

        —Yes, you ______, but you ______ finish it now.

         A. must, mustn’t                 B. must , don’t have to

         C. may, needn’t                  D. may , mustn’t

— Must I finish the exercise at school?

   — No, you don’t have to. You          do it at home.

A. must        B. need             C. will             D. can

——Must we finish the exercise today?   ——No, you________.

A．mustn’t          B．don’t have       C．don’t have to     D．needn’t to

——Must we finish the exercise today?   ——No, you________.

——Must we finish the exercise today?   ——No, you________.