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According to the air traffic rules, you should off your mobile phone before boar

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According to the air traffic rules, you should off your mobile phone before boar

According to the air traffic rules, you should ________ off your mobile phone before

 boarding.

A. cut    B. put    C. call    D. switch

试题答案

D

解析:

略

标签：yourulesoffshouldtraffic

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