在下列横线上填入适当的句子，补全对话。

A: Good morning!

B: Yes, please. I'd like to buy a pair of leather tennis shoes.

A: What color do you want?

B: Let me see...

A: Er... We have two colors, which one do you like better?

B:

A: What size of the shoes do you wear?

B: Size 37.

A:

B: They look nice and soft. May I try them on?

A: Certainly.

B: Oh, I'm afraid they're a little small for me.

A: Here's another pair in Size 38. What do you think of them?

B: Oh, good. They're big enough.

A: Two hundred and eighty yuan.

B:

A: Maybe. But good things always cost much.

B: OK. I'll take them.