—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
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—Are you going to help him?—Why ___ I help him? He' s never done anything for me．
#63530
A
would
B
could
C
might
D
should
— Where is my dictionary?— You ______ it in the wrong place.
#62851
A
must
B
should have put
C
might put
D
might have put
---Is that Lucy’s sister, Lily?---No, it _______ be her. She has gone to English.
#75840
A
could
B
can
C
can’t
D
mustn’t
–Look! The boy is running fast! –He might ______ to catch a bus.
#75241
A
run
B
running
C
is running
D
be running