- Air_______ is one of the biggest problems in the world today

- Yes. We must take action to make the air less_______.

A. pollution; pollution B. pollute; pollution

C. pollution; pollute D. pollution; polluted

 

D

【解析】

試題分析：句意：—空氣污染是當(dāng)今世界上最大的污染之一�！堑摹Ｎ覀儽仨毑扇〈胧┛諝馕廴緶p少�？諝馕廴臼敲~，故填pollution，polluted過去分詞表被動(dòng)，故選D。

考點(diǎn)：考查名詞和非謂語動(dòng)詞的用法。

 

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