标题: 语法一题！ [打印本页] 作者: brendaqian 时间: 2011-2-14 11:11 标题: 语法一题！ 谢谢大家帮忙看看这题选啥 A 1972 agreement between Canada and the United States reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.
A reduced the amount of phosphates that municipalities had been allowed to dump B reduced the phosphate amount that municipalities had been dumping C reduces the phosphate amount municipalities have been allowed to dump D reduced the amount of phosphates that municipalities are allowed to dump E reduces the amount of phosphates allowed for dumping by municipalities
