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21．―Nice to meet you, Dalong!― ．A．How do you do? B．Nice to meet you, too.C．How are you? D．Hello! 【查看更多】

 

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—Nice to meet you, Dalong!

—_________．

A．How do you do?                       B．Nice to meet you, too.

C．How are you?                         D．Hello!

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