—I usually go there by train—How about by boat this time？A. goingB. to go C. went D. go

问题补充：

—I usually go there by train．—How about by boat this time？

A. going

B. to go

C. went

D. go

答案：

(答案→)A. going

B. to go

C. went

D. go

解析：How about．．．？用来提出建议或征求意见。 about在此结构中是介词，后面接动名词，故该题选A。