首页 > 话题 > OG 15 > 求问一道SC题目 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
求问一道SC题目 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
正答是D，我选的A，为什么allow的时态不可以用过去完成时表示reduced的是过去允许倾倒的量，OG解析如下：Since the dumping continued after the date of the agreement, the past perfect verb bad been allowed should instead be the present are allowed (if the agreement remained in effect when the sentence was written) or the past were allowed (if the agreement was no longer in effect when the sentence was written).
谢谢大家
