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    【题目】—The cars give off a great deal of waste gas into streets. —Yes. But I'm sure something will be done to __________ air pollution.

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

    【答案】A

    【解析】句意：“车辆向街道释放出大量的废气。”“是的，不 过我相信一定会采取措施减少空气污染。”故只能用re- duce “减少”。remove “使移动，除去，搬家”；collect “收 集，募集，征收”；warn “警告”。

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