（2011枣庄）You________wear sports shoes when you climb a mountain．
A. can’t
B. shouldn’t
C. mustn’t
D. have to
—Will you stay for some more days?
—Sorry, I_____. My mother called to ask me to go back at once.
A. mustn’t B. may not C. can’t D. wouldn’t
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
