---I want to know if I can smoke here?---No, you _________. Could you see the sign “NO SMOKING” there? 
#75545
A
needn’t
B
couldn’t
C
won’t
D
mustn’t
推荐题目
Johnny, you      play with the knife; you     hurt yourself.
#63075
A
won’t; can’t
B
mustn’t; may
C
needn’t; must
D
can’t; should