( ) 1. Mr Wang ______ be in Nanjing now, he went to Beijing only this morning.
A. mustn’t B. may not C. can’t D. needn’t
( ) 2. –Must I saty at home, Mum? --No, you ______.
A. needn’t B. mustn’t C. don’t D. may not
( ) 3. –Can you go swimming with us this afternoon?
--Sorry, I can’t. I _____ take care of my little sister at home because my mother is ill.
A. can B. may C. would D. have to
( ) 4. –May I go to the cinema, Mum? --Certainly. But you ______ be back by 11 o’clock.
A. can B. may C. must D. need
