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Now there’s a system the waste is disposed of using the principles of ecology.A.

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Now there’s a system the waste is disposed of using the principles of ecology.A.

Now there’s a system _________ the waste is disposed of using the principles of ecology.

A.when????????????? ????????????? ????????????? B.which????????? C.that????????????? ????????????? ????????????? ????? D.where

 

试题答案

【答案】

D

【解析】

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标签：wasteisdisposedthenow

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