标题: OG(12th)愈发74,跟白老师的答案不一样 [打印本页] 作者: 仰天大睡的猫 时间: 2011-6-6 20:52 标题: OG(12th)愈发74,跟白老师的答案不一样 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