—Mom．may l watch TV after supper?

—No, you                    ．You have to finish your homework first．

A．needn't                B．mustn't                C．shouldn't                D．don't have to

---Must I do the work today? 

---No, you _______. You may do it tomorrow.

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

--May I take the magazine out of the library?

--No，you _________．

A．needn't          B．may not         C．shouldn't             D．mustn't

— Must I finish that work today?

— No, you _____. You may finish it in three days.

—Excuse me. May I sit here? 

—I’m afraid you _________. My daughter will come back soon.

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