All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.
#74653
A
something useful
B
anything useful
C
useful something
D
useful nothing
推荐题目
The haze or smog was so serious that the winter running _________.Some students complained as they ran
#62272
A
could have cancelled
B
should have cancelled
C
must have been cancelled
D
ought to have been cancelled
I’m as busy as a bee；________ you bother me with so many questions now?
#62283
A
may
B
must
C
can
D
shall
—Look at the picture on the wall. It ________be David’s.—Yes, his name is on the first page.
#76503
A
can
B
can’t
C
must
D
mustn’t
(2013·浙江金华二模)A survey has shown that 40% of those killed in traffic accidents ________ if they had been wearing seat belts.
#62415
A
should have been saved
B
must have been saved
C
need have been saved
D
could have been saved