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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：——我们城市的空气质量正在变得越来越糟糕。——是的。这些日子的PM2.5指数吓人。我们必须采取措施减少空气污染。A. reduce 减少；         B. remove 移动；    C. collect收集；  D. gather聚集；根据Air quality in our city is becoming worse and worse.可知空气质量越来越差，因此要减少空气污染。故选A。

     考点：考查动词词义辨析的用法。

     

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