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— Air quality in our city is becoming worse and worse.

   —Yes. These days' PM2.5 readings are frightening. We must do something to ______air pollution.

A. reduce                B. remove      C. collect        D. gather

 

【答案】

A

【解析】

试题分析:句意:我们必须做事情以减少空气污染。结合所给选项,故选A。

考点:考查词义辨析

 

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