根据对话情境，从方框中选择适当的句子补全对话。

A．How much is this sweater？ B．Can I help you? C．I'll take it. D．What color do you want? E. It's too big.

A:

B: Yes, please. I want a sweater.

A:

B: Green.

A: Here you are.

B: Oh!

A: Sorry, this is a small one.

B: Good.

A: 20 dollars.

B:Here is the money.

A: Thank you.