I usually go back my hometown by train.Why not -------by boat for a change?A to try going B trying to go Cto try and go Dtry going

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I usually go back my hometown by train.
Why not -------by boat for a change?
A to try going B trying to go Cto try and go Dtry going

D
why not =why don't you后面永远加do
意思是:为什么不……呢

D
why not 后面必须加do try 既可以加to do 又可以加doing