Some aspects of a pilot’s job__________ be boring, and pilots often ________ work at inconvenient hours．
#63540
A
can; have to
B
may; can
C
have to; may
D
ought to; must
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My sister met him at the cinema yesterday afternoon, so he your lecture.
#63160
A
couldn’t have attended
B
needn’t have attended
C
mustn’t have attended
D
shouldn’t have attended
We can eat in the dining hall. But we _______ eat in the classroom.
#75733
A
don’t
B
didn’t
C
can’t
D
aren’t
--- Listen! David is talking happily with his mother in the next room. --- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
#77427
A
should
B
must
C
can’t
D
mustn’t
--- It’s so late. Our son______ be back!--- Don’t worry. I dare say he ______ have some extra work to do.
#62953
A
can; must
B
will; might
C
should; must
D
must; may
Lucy’s colour ________blue because she likes to be the leader, so it __________red.
#77316
A
can’t be, must be
B
can’t be, mustn’t be
C
should be , must be
D
must be, can’t be