The students ought to wear school uniforms when they’re at school.
A. are supposed to B. are allowed to C. would like to D. love to
—Mr Smith must have been to your home this morning．
—No, he ______, because he didn’t know my address．
A. couldn’t B. can C. mustn’t D. may not
—How was the youth club last night, Mark?
— It was great fun. You come.
A. must B. can C. should D. may
—Is this John’s T-shirt?
—It_______be his. It`s much too small for him.
A. needn’t B. shouldn’t C. can’t D. must
The desk is not dirty．You ________ clean it．
A. mustn’t
B. shouldn’t
C. needn’t
D. can’t
— Can I go to the movie, Mum?
— Certainly. But you _______ be back by ten o’clock.
A. can B. may C. might D. must
