问题
选择题
---______ go walking with us after supper this evening?
--- Great! I have nothing important to do.
A．What about
B．Why don’t
C．Why not
D．Let’s
答案
答案：C
题目分析：What about doing？做···怎么样呢？提建议。Why don’t you do=" Why" not do？为什么不做……，也是提建议。Let’s do sth让我们做···，提建议，肯定句。该句是问句，故选C