题目内容
(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
A
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题目内容
(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
A