请教OG76,92

76：Gall's hypothesis (of there being different mental functions localized in different parts of brains widely accepted today)

C：that different mental functions are localized in different parts of the brain is widely accepted today.(这个选项没有头重脚轻的问题吗？）

E;which is widely accepted today is that there are different mental functions localized in different parts of the brain.(这个选项为什么不好）

92：Never before had taxpayers confronted so many changes at once as they had in the Tax Reform Act of 1986.

A;so many changes at once as they had in ( 这里OG的解释是had 后省略了confronted,不明白）

D；as many changes at once as they confronted in (correct answer)

76. xxx hypothesis that ......, 是对hypothesis的同位语解释，原句结构是"hypothesis (that ....) is wildly accepted today" But E is "hypothesis (which ...) is that ......"从而改变了句子结构和重心。尽管句意相似可在GMAT SC中是不允许的。

92. A: so many xxx as (错, no such compare) they had (confronted) in xxx of 1986.
1986用过去完成时错

A;so many changes at once as they had in ( 这里OG的解释是had 后省略了confronted,不明白）
原句还原为： taxpayers never before had confronted so many changes at once as they had (confronted) in the Tax Reform Act of 1986.
had here is not the past tense of have, it is 过去完成时的标志词，　其后省略了中心词confront.

D；as many changes at once as they confronted (or did) in

我不是NN，回楼上

好像改成Gall's hypothesis is widely accepted today that different mental functions are localized in different parts of the brain. 哪为NN指点一下这样行否？

我觉得不好，首先that引导的是什么从句，如果是同位于从句者一般应与被描述的词相邻，使用同位语从句的原因就是因为被描述的词不足以提供足够的信息，而需要用一个句子来告诉阅读者到底说的是怎么样一件事情。正因为很多人并不知道Gall's hypothesis 是什么，所以需要一个从句来对其进行描述如果如上修改，如果句子一开始就（Gall's hypothesis is widely accepted today），会给人一种不知所云的感觉。不如将描述的化放在需要解释的词后面，让读者知道到底是怎样的一种hypothesis is widely accepted today. （一家之言）

which也可以引导限定性定语从句的！

例句：Rainforests are being cleared for valuable timber and other resources to speed up the economic growth of the nation which they are located. 为了加速他们各自所在国家的经济发展，热带雨林作为有价值的原木和其他资源正为人们所砍伐。

agree