--Is the man standing outside the teacher’s office Mr. Zhou? --No, it ______ be him. He has gone to Hong Kong for an academic conference.
#78290
A
mustn’t
B
can’t
C
needn’t
D
couldn’t
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He ______ it on schedule, but somehow he fell behind.
#62908
A
must have done
B
might finish
C
could have finished
D
could finish
My sister ______ an English teacher in our school. Now she works in America.
#77750
A
was used to be
B
used to
C
used to be
D
used to being
He________sleep，although he tried to，when he got on such a hunt for an idea until he had caught it.
#62298
A
wouldn’t
B
shouldn’t
C
couldn’t
D
mustn’t
My friends __________ come to see me. I don’t want to go out in case they come.
#62267
A
can
B
must
C
may
D
will