Cars play an important role in modern life, but they_______also cause many problems like air pollution．
#89014
A
should
B
can
C
must
D
Will
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Had it not been for the police’s help, Peter his bicycle yesterday afternoon.
#87214
A
could not find
B
could not have found
C
didn’t find
D
hadn’t found
— Do you still remember when we went to Chongqing? —I can’t remember now but ______ sometime last summer?
#90411
A
could it be
B
might it be
C
could it have been
D
might it have been
---I’m sorry. I _________ at you the other day.---Forget it. It was a bit out of control myself.
#86373
A
shouldn’t shout
B
shouldn’t have shouted
C
mustn’t shout
D
mustn’t have shouted
—Sorry, sir. I can’t answer this question. ---Well, you are supposed______ this part of history.
#86779
A
reading
B
to be reading
C
to have read
D
having read