- Why not go and have dinner in a restaurant? . It’s too expensive.A. Why notB. I a

问题补充：

--- Why not go and have dinner in a restaurant?

--- . It’s too expensive.

A. Why not

B. I agree

C. I’m afraid not

D. I’m sure

答案：

A. Why not

B. I agree

(答案→)C. I’m afraid not

D. I’m sure

解析：考查交际用语：A. Why not为什么不，好啊，B. I agree同意，C. I’m afraid not恐怕不能，D. I’m sure我确定。句意：--为什么不在饭店吃饭？--恐怕不能。太贵了。选C。