题目内容：

九上的 对话A：Good morning!What can l do for you?B：…
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I want a sweater.
what size do you want?
I want a large one.
How about this one?
I don't like the color.Do you have blue ones?
Here you are.
It's nice.How much is it?
27 dollars.
I'll take it.Here is the money.
Thanks.
You're welcome.