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
推荐题目
How I wish every family _____ a large house with a beautiful garden!
#87133
A
has
B
had
C
will have
D
have
His homework______, but it _____.
#90163
A
needs correcting; needn’t rewriting
B
need be corrected; doesn’t need to be rewriting
C
needs correcting; needn’t be rewritten
D
needs to be corrected; needn’t to be rewritten
----I thought you wouldn’t mind.----Well, as a matter of fact I don’t, but you _____ me first.
#89312
A
should ask
B
should have asked
C
must ask
D
must have asked
—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
— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear ! She ______ a lot of difficulties !
#90563
A
may go through
B
might go through
C
ought to have gone through
D
must have gone through