—Listen ! Helen is singing in the next room.—It _______ be Helen. She has gone to Beijing.
#74851
A
can’t
B
mustn’t
C
may
D
should
推荐题目
You_____ all those calculations! We have a computer to do that sort of thing.
#63501
A
needn’t have done
B
must not have done
C
shouldn’t have done
D
can not have done
Being constantly exposed to advertisements is annoying, but it ______ be pleasant sometimes.
#62822
A
shall
B
need
C
can
D
must
Mountain climbing ______ be really dangerous at times even though it is challenging and exciting in general.
#62524
A
can
B
should
C
shall
D
must
It's nearly time for the meeting to start. The manager ________ be here soon.
#62934
A
could
B
should
C
need
D
would
The light in his office is out. He_________ left for home.
#62358
A
must have
B
must have been
C
should have
D
should have been