---Must I hand in my exercise book now, Mr. Zhao?

---No, you ______. You may give it to me tomorrow.

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

－When should I hand in my paper?  －It         after class.

A．must be handed in   B．is handed in        C．was handed in      D．will hand in

--- Must I hand in my report now?

   --- No, you ________. You still have some time.

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

-  When should I hand in my paper?

— Your paper must  _    as soon as the bell_    .

A. hand in; rings           B. hand in; will ring

C. be handed in; will ring  D. be handed in: rings