问题补充：
—— I usually go there by train.
—— Why not＿＿＿＿＿by boat for a change?
A. to try going
B. trying to go
C. to try and go
D. try going
答案：
A. to try going
B. trying to go
C. to try and go
(答案→)D. try going
解析：Why not try going...?＝Why don’t you try going...?
