---Who is the tallest boy? ---It ______ be John. John is of medium height.
#77245
A
must
B
needn’t
C
might
D
can’t
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David, you _____play with the valuable bottle; you_______ break it.
#62983
A
won’t; can’t
B
mustn’t; may
C
shouldn’t; must
D
can’t; shouldn’t
—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
You can’t imagine that a well-behaved gentleman __________ be so rude to a lady.
#63029
A
must
B
would
C
should
D
could
—Will you please answer the door? It ________ be your sister.—Sorry, I ________. I’m feeding the rabbit.
#74502
A
must; mustn’t
B
may; can’t
C
will; can’t
D
must; needn’t