—Why don’t you join an English club to practice speaking English?—!A. That’s OKB. Not at a

问题补充：

—Why don’t you join an English club to practice speaking English?

—!

A. That’s OK

B. Not at all

C. Good idea

D. It doesn’t matter

答案：

A. That’s OK

B. Not at all

(答案→)C. Good idea

D. It doesn’t matter

解析：That’s OK.没关系；Not at all 别客气；Good idea好主意；It doesn’t matter没关系。句意：干嘛不加入一个英语俱乐部练习说英语呢？故选Ｃ。