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It has been announced that passengers open their seatbelts until the plane has l

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It has been announced that passengers open their seatbelts until the plane has l

It has been announced that passengers __________ open their seatbelts until the plane has landed．

A.mustn’t

B.won’t

C.needn’t

D.mightn’t

试题答案

A

标签：openpassengerstheiruntilseatbelts

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