Passengersfastentheirseatbelts

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更新 2022-09-03
科目英语
题型单选题
难度中等
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Passengers _____ fasten their seat belts immediately after taking their seats. The belts should remain buckled during the flight whether or not the “fasten seat belt” light is on.

A．shall

B．might

C．need

D．would

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