—Could I have a word with you，mum?—Oh，dear，if you _____．
#88016
A
can
B
must
C
may
D
should
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It is vital that we _____ act out at once to protect the environment.
#90531
A
would
B
should
C
will
D
can
We ______ such great success without your efforts. Thanks a lot.
#87998
A
shouldn’t have accomplished
B
couldn’t have accomplished
C
were unable to accomplished
D
mustn’t have accomplished
He___ have attended the meeting this morning. He has been staying at my home for a whole day.
#88533
A
can’t
B
mustn’t
C
shouldn’t
D
needn’t
----Look,Mr.Hu is on the other side of the street. ----It____ be him.He has gone to Lanzhou.
#87934
A
mustn’t
B
can’t
C
wouldn’t
D
couldn’t