On rainy days, accidents ______ happen sometimes on steep roads.
#63545
A
should
B
shall
C
must
D
can
推荐题目
Jim______   sing Chinese songs very well now, but he______do it last year.
#75382
A
can; can’t
B
could; can’t
C
can; couldn’t
D
could; couldn’t
I am feeling sick now.I ________ so much chocolate.
#63485
A
needn’t have eaten
B
couldn’t have eaten
C
mustn’t have eaten
D
shouldn’ t have eaten