单项选择题

—Are we supposed to take off our shoes before we enter
—No, you ().

A.shouldn't
B.needn't
C.mustn't
D.can't

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单项选择题

I wrote it down () I should forget it.

A.in case
B.in case of
C.in order that
D.for fear of

单项选择题

She tried hard, but still couldn't make us () our mind.

A.to change
B.change
C.turn
D.to turn

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