--Who’s the man over there?Is it Mr Black?----It _____be him.He’s much taller.
#75687
A
mustn’t
B
can’t
C
should
D
may
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— _______ 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
—Must I take out the trash?—No,  you ________.
#75794
A
need
B
needn’t
C
couldn’t
D
shouldn’t