On rainy days, accidents _____ happen sometimes on steep roads.
#87694
A
should
B
shall
C
must
D
can
推荐题目
It was essential that the application forms ________ back before thedeadline.
#87750
A
must be sent
B
would be sent
C
be sent
D
were sent
It ______ heavily when he got back home for he was wet all over.
#87955
A
was raining
B
must have been raining
C
must be raining
D
rained
— Oh, it’s you. I__________ you. Why are you looking so thin and pale?— I’ve been ill for weeks and still under treatment. 
#88167
A
can’t recognize
B
could hardly recognize
C
haven’t recognized
D
wasn’t recognizing
Our English teacher suggested we ________ English as much as possible in class.
#87550
A
must speak
B
may speak
C
spoke
D
should speak