—Have you decided to Xi’an? —Yes. I’ll go there by train. It’s much cheaper than by plane

—Have you decided to Xi’an?
—Yes. I’ll go there by train. It’s much cheaper than by plane.
A. when to go
B. how to go
C. where to go
D. whom to go

A. when to go(答案→)B. how to goC. where to goD. whom to go解析：考查宾语从句。根据I’ll go there by train.可知，是问的怎样去西安，故选B。

感谢回答，我学习了