—_______ I borrow your English book?—Yes, of course you _______. 
#75280
A
Could; could
B
Must; can
C
Could; can
D
Can; could
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You_____ all those calculations! We have a computer to do that sort of thing.
#63501
A
needn’t have done
B
must not have done
C
shouldn’t have done
D
can not have done
Could you please_____ the piano so loudly? Your brother is having a rest now.
#74747
A
not to play
B
not play
C
don’t play
D
to not play