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题型:单选题 题类:模拟题 难易度:普通

江苏南京市鼓楼区2017届九年级英语中考第一次模拟考试试卷

—The river is becoming dirtier because the steel factory has put waste into it.

—Yes. We must take action to improve the         .

A、condition B、pollution C、position D、situation
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