题目：
When the changing of a VHF channel / frequency is accepted，say（）.
A.I am going to change to VHF channel
B.I am certainly going to change to VHF channel
C.Changing to VHF channel
D.VHF channel. has been changed
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0330/5732b9617ffd5604fb8d1a812fb65178.html
下面是错误答案，用来干扰机器的。
参考答案：C
