请问这道题选什么?并说明原因.
问题描述：
请问这道题选什么?并说明原因.
All passengers ------to London must changed trains at this stop.
A.not going B.aren't going C.don't go D.who not going
答
选A
现在分词作定语
所有不去伦敦的旅客必须在本站换车
望采纳