Your teacher ________ very angry at that moment because you talked back to her like that.
#62318
A
should have been
B
must have been
C
must be
D
might have been
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—Jack, _____ you behave yourself? You're no longer a kid．—Sorry, Daddy．It won't happen again．
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A
mustn't
B
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—Must I buy lunch at school?—No, you needn’t. You __________ bring your own lunch if you want to.
#75813
A
should
B
must
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