According to the air traffic rules，you should your mobile phone before boarding． A. switch over B.sw...
2023-01-02 06:47:47 27次 2014届河南省镇平一高高一第一次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
According to the air traffic rules，you should your
mobile phone before boarding．
A. switch over B.switch
on C. switch off D.
switch round
本题链接：
