But for their common interests, they_____ cooperated so smoothly in the investigation of the case.
#86893
A
could have
B
will not have
C
could not have
D
have not
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He _______ Shanghai, for I saw him talking with the headmaster a moment ago.
#90144
A
must have gone to
B
can’t have gone to
C
mustn’t have been to
D
can’t have been to
We _____ for her because she never came.
#90213
A
mustn’t have waited
B
shouldn’t have waited
C
mustn’t wait
D
needn’t wait
This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.
#90493
A
would
B
should
C
could
D
might
It’s time that you_____with the relief work in the flood-stricken area after the awful typhoon.
#86767
A
must help
B
can help
C
helped
D
have helped
Should the present unemployment continue, the society________a more troublesome situation.
#87368
A
would have faced
B
would face
C
is facing
D
has faced