---How about going for a walk after supper?
----- .
A. No, I’m busy.
B. Why do that?
C. Yes, let’s do.
D. Good idea
网友回答
A. No, I’m busy.
B. Why do that?
C. Yes, let’s do.
(答案→)D. Good idea
解析：考查：what/how + doing 表示提建议，句意：晚饭后去散步怎么样？故用D Good idea.真是个好主意。