摘要：29．According to the air traffic rules, you switch off your mobile phone before boarding. ( ) A．may B．can C．would D．should
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According to the air traffic rules, you ___ switch off your mobile phone before boarding.
A. may B. can C. would D. should
查看习题详情和答案>>According to the air traffic rules, you ___ switch off your mobile phone before boarding.
A. may B. can C. would D. should
查看习题详情和答案>>According to the air traffic rules, you ___ switch off your mobile phone before boarding.
| A．may | B．can | C．would | D．shall |