It ____ be our headmaster. He has gone to Beijing.
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A
mustn’t
B
won’t
C
may not
D
can’t
推荐题目
（天津市河东区201 4年高三二模考试）14. I_______ to go for a walk, but someone called and I couldn't get away.
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A
was planning
B
planned
C
had planned
D
would plan
But for the traffic jam,we long ago.
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A
will have arrived
B
should
C
had arrived
D
would have arrived
Robert wishes that he ________ business instead of history when he was in university.
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A
studies
B
studied
C
has studied
D
had studied
(2013·高考陕西卷)My mom suggests that we________eat out for a change this weekend.
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A
should
B
might
C
could
D
would
—The woman biologist stayed in Africa studying wild animals for 13 years before she returned.—Oh, dear! She _______ a lot of difficulties!
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A
may go through
B
might go through
C
ought to have gone through
D
must have gone through