—Must I come back before supper, mum?

—No, you       .

1 

—Must I come at four o’clock?

— Oh, no, you ____.

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

 -- Must I come here at eight o'clock?                                           

 -No, you ____. You may come a little later.                                      

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

— Must I come at four o’clock?

— Oh, no, you ____.

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

— Must I come at four o’clock?

— Oh, no, you ____.

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