[求助]大全第二题 一个很古老的问题……

天蝎宝宝

1.      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
        

很多人讨论的结果是A。但是发现OG11th的第62题是原题，选的答案是D。给出的理由如下：The past tense ‘reduced’ is correctlyused in this sentence to describe a past action,and the present tense ‘are allowed’ is used to describe the present situation.

就不知道到底应该是啥…… 恳请大牛解答……

Zeldaw

选D，OG是对 的。法律和真理的内容都应当是一般现在时