补全对话。

A -- salesgirl         B -- customer

A: Good afternoon, can I help you?

B: Yes, (1) ______ .

A: We have different kinds of sports shoes. They're all in style. What color would you like?

B: I prefer blue.

A: (2) ______ ?

B: Size 40.

A: What do you think of this pair?

B: Great! (3) ______?

A: Certainly. This way, please.

B: Oh, they fit me very well. (4) ______?

A: 500 yuan.

B: (5) ______. I can't afford.

A: Well, I'll give you a 20% discount.

B: OK. I'll take them.