-Look, your sister is playing the piano over there.-She ______ be my sister. She has gone to America.
#77768
A
mustn’t
B
can’t
C
shouldn’t
D
may not
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 -- Must I return the book by the end of next month?--    . You can keep it as long as you like.
#62836
A
No, you mustn’t
B
No, you can’t
C
Yes, you have to
D
No, you needn’t
— Must I stay here with you?—No, you_____. You may go home, but you ______go to the net bar.
#77257
A
mustn’t , needn’t
B
needn’t, mustn’t
C
must, need
D
need, must
—How is the debate of your essay?—It ____ well, but I ____one of the key points.
#62979
A
might work; hadn’t forgot
B
needn’t have worked; forgot
C
could have worked; forgot
D
would work; hadn’t forgot