给下面句子排序（用数字表示）   

A. 1. It's a crayon.                      

     2. What's that in English?

     3. Excuse me, Wang Bing.              

     4. Thank you

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B. 1. What's that in your school bag?     

    2. Oh, I see.

    3. It's a Walkman.                  

    4. Come here, Yang Ling.

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