62. 1972 agreement between
reduced the amount of phosphates that municipalities had been allowed to dump into
(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
答案怎么选出来的已经知道了，只是如果谓语动词如果不是reduced而是banned的话是不是用过去完成时就行了？
为什么banned就要用过去完成时？这个问题我不是很理解。。。
这里用一般现在时是因为该行为是政府的行为和决定，难道换成banned就不是了？
楼上的没看这道题的OG解释。OG说倾倒是一个仍在进行的一般性动作，所以要用一般现在时。
我跟楼主的看法一致。等nn来鉴定喽。
看下这题，
At a recent session, the French government has decided that Paris needs a second, larger opera house to complement the famous Paris Opera.
(A) has decided that Paris needs
(B) decided that Paris needs
(C) has decided that Paris will need
(D) decided that Paris has a need of
(E) has decided that Paris needed
答案是B，如果按og的说法，那就意味着这题应该如此解释：巴黎将一直持续需要opera house
回到lz的原题，如此也可以解释lz对于ban的疑问，如果是ban的话，该句意思应该理解为：禁止了以后，还要一直禁止下去，这样的话还是应该用一般现在时。
所以我觉得，新东方对于这类题的解释还是不错的，凡是政府的决定和行为都用一般现在时，用这个方法做题既简单又快，也不需要考虑诸如是否该动作还在进行的问题，考虑这个问题，如果不细致反而容易出错。
我觉得这两道题还是有一些区别的。
楼上举的例子里Paris needs a second，larger opera house to complement the famous Paris Opera确实是政府的决策不假，但是我问的题里的that引导的从句并非是政府的决策，而是修饰phosphates的定语从句，意思是，1972年的协定削减的不是其他PHO的数量而是市政府当局被允许倒入大湖中的PHO的数量，而是因此楼上所说的公理我个人认为不能完全应用到这题里吧？
请指教。
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