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---Fifty dollars for such a T-shirt! You _______ be joking!---I’m serious．It’s made of silk.
#75661
A
must
B
need
C
may
D
Can
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If you         smoke, please go outside.
#62183
A
can
B
should
C
must
D
may
You'd better ____ football in the street.
#75999
A
play
B
not play
C
not to play
D
plays
--- I was lucky to win a gold medal in the 800-meter-race. --- You __________ through tough training.
#63221
A
must go
B
should go
C
must have gone
D
should have gone
How ________ I help them to understand when they don’t listen?
#63202
A
must
B
dare
C
can
D
may
—Is that Lucy’s cousin, Anna?—No, it ______ her. She has gone to Paris.
#76831
A
mustn’t be
B
might be
C
can’t be
D
could be