--Since you have enough time why not try going by boat for a change?-.A. Good ideaB. T

问题补充：

--Since you have enough time, why not try going by boat for a change?

---.

A. Good idea

B. That’s true

C. I suppose so

D. You are too kind

答案：

(答案→)A. Good idea

B. That’s true

C. I suppose so

D. You are too kind

解析：在英文中对于别人的建议如果觉得可行可用好主意短语good idea来回答，故本题选A。