问题
选择题
According to the air traffic rules, you should ________ off your mobile phone before
boarding.
A．cut
B．put
C．call
D．switch
答案
答案：D
搜题请搜索小程序“爱下问搜题”
According to the air traffic rules, you should ________ off your mobile phone before
boarding.
A．cut
B．put
C．call
D．switch
答案：D