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    waste water was put into the rivers, and lakes which were badly polluted. A. At one time B. At a time C. One time D. A time 【查看更多】

     

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    （2010·江苏省如东高级中学高三国庆假期自主练习二）    3. ________waste water was put into the rivers and lakes, which were badly polluted.

    A. At one time     B. At a time          C. One time        D. A time

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