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- 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。—是的。我們必須采取措施空氣污染減少。空氣污染是名詞,故填pollution,polluted過(guò)去分詞表被動(dòng),故選D。

考點(diǎn):考查名詞和非謂語(yǔ)動(dòng)詞的用法。

 

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