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用恰當(dāng)?shù)脑~填空，完成對話．每空一詞。

A：Where have you been, Mike? I phoned you, but you weren't in．

B：I've been to a rubber factory．

A：　　1　　 did you go there?

B：Because I found the factory pouring 　　2　　 water into the river．And it has made lots of fish 　　3　�。�

A：That's terrible．

B：Do you think“Greener China”can do something?

A：Yes, of course．I think we should write a letter to the newspaper 　　4　　 the pollution．

B：Good idea! It's our 　　5　　 to protect the environment．

答案：
解析：

Why　waste　dead　about　duty


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