— _______ I ask you something, if you are not busy?—Yes, of course you _______. 
#62809
A
Should; should
B
Could; can
C
Could; could
D
Can; Could
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-----Whose T-shirt is this?----- It _______ be John’s. It’s _______ small for him.
#75695
A
can’t; much too
B
can’t; too much
C
mustn’t; much too
D
mustn’t; too much
----I passed the college entrance examination.----Congratulations! You________.
#63093
A
could have studied hard
B
must have studied hard
C
should have studied hard
D
might have studied hard