— Must I go to medical school and be a doctor like you，Dad?

— No，you__________，son．You’re free to make your own decision．

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

—Must I go to the shop with you，Mum?

—Err... I can make it myself，Mike. You         go with me.

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

—Must I go with you?

—No, you ________.

—Must I go through the radiation (辐射) check when I come back from Japan at the airport these days?

—Yes, you ______.

    A. can          B. may          C. might            D. must

—Must I go home?

—No,  you ________.