问题描述：
对话排列：(A How much is this hat.) (B I'lltake it .) (C Can I help you?)
(D It's twelve dollars)( E Yes,please ,I want a hat.)(F Here you are)(G You're welcome)(H thank you)(I We have hats in all colors)
(D It's twelve dollars)( E Yes,please ,I want a hat.)(F Here you are)(G You're welcome)(H thank you)(I We have hats in all colors)
问题解答：
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