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I couldn't understand at the poor child. A. you to laugh B. you laugh C. why laugh D. you laughing 【查看更多】

 

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I couldn't understand ______ at the poor child.

     A. you to laugh     B. you laugh         C. why laugh         D. you laughing

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I couldn't understand ______ at the poor child.

A．you to laugh

B．you laugh

C．why laugh

D．you laughing

 

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