2. 外语
  3. All passengers are advised that the seat belts should be tightly fastened______takeoff and landing.

All passengers are advised that the seat belts should be tightly fastened______takeoff and landing.

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问题 All passengers are advised that the seat belts should be tightly fastened______takeoff and landing.
选项 A、prior to
B、with
C、over
D、due to
答案A
解析 词汇：介词1．这是一道词汇题，选项均为介词。2．原文意思是“起飞和着陆前要系好安全带”，由此可见(A)prior to为正确选项。
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