Without gravity, we _____ walk on the ground as freely as we do now. 
#63085
A
couldn’t
B
mustn’t
C
shan’t
D
needn’t
推荐题目
According to the newly-made traffic regulations, ____drives through the red light ____be fined at least 200 dollars.
#63597
A
no matter who ;may
B
whoever; shall
C
anyone who ;would
D
anyone ;should
David, you _____play with the valuable bottle; you_______ break it.
#62983
A
won’t; can’t
B
mustn’t; may
C
shouldn’t; must
D
can’t; shouldn’t
Tom, you ________ leave all your clothes on the floor like this next time. 
#63404
A
mustn’t
B
wouldn’t
C
needn’t
D
may not