A mistake ______ have been made on our bill. We didn’t order any fish today.
#62733
A
should
B
would
C
could
D
must
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--Excuse me,Mr. Li,_________ I close windows? It’s cold now.--Yes,you__________
#76604
A
can; can't
B
can; may
C
may; can’t
D
may; can
-Can I watch TV now? -No, you ________. You ________ do your homework first. 
#77322
A
can; must
B
can’t; mustn’t
C
can’t; must
D
can; mustn’t