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---Fifty dollars for such a T-shirt! You _______ be joking!---I’m serious．It’s made of silk.
#75585
A
must
B
need
C
may
D
can
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We         arrive at six. But I’m sorry we are late.
#63290
A
should
B
were supposed to
C
must
D
ought to
I have lost one of my gloves. I __________it somewhere.
#63181
A
must drop
B
must have dropped
C
must be dropping
D
must have been dropped
There was something wrong with the network，or the e-mail____ earlier.
#62904
A
could have been sent
B
might be sent
C
need have been sent
D
must be sent
There is a “ No smoking “ sign here. You _________ smoke.
#77266
A
can
B
may
C
needn’t
D
mustn’t
I______ thank you too much for all your help to my son while we were away from home.
#63489
A
won’t
B
can’t
C
can
D
will