题目内容
________ air pollution, such as smog (雾霾), ________ our health, we should do something like wearing a mask (面罩).
A. Stop, to hurt B. To stop, hurting C. Stopping, to hurt
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题目内容
________ air pollution, such as smog (雾霾), ________ our health, we should do something like wearing a mask (面罩).
A. Stop, to hurt B. To stop, hurting C. Stopping, to hurt