求教TTGWD2-30（以前讨论没结果）

glitters

                                                               TTGWD2-30                                                                
                                                          Most insomnia is not an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications, anxiety about travel, or stress before a job interview.

1. an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications
          
   
2. an illness or a physical condition so much as symptomatic of another problem that may be a simple one, like a reaction caused by certain medications
          
   
3. so much an illness or a physical condition but a symptom of another problem that may be as simple as when certain medications cause a reaction
          
   
4. so much an illness or a physical condition, but it is a symptom of another problem, maybe a simple one like certain medications causing a reaction
   
5. so much an illness or a physical condition but symptomatic of another problem, maybe simply a reaction to certain medications。
   

我这的答案是A,但我看到有人的答案是E。到底是什么呀?
看过以前的贴，很多人说A没有用NOT...BUT所以排除，但是难道不能单独用NOT么，或者是NOT SO MUCH AS，就非得和BUT一起用么？而且E 虽然用了NOT...BUT也不平行啊，因为把an illness（名词）和 symptomatic（形容词）并列了，只是一个形式主义，而A至少是平行的。
迷惑中。。。。求教！

kittenknight

这是一个固定搭配，not so much A, but B,我记得OG12上面有类似的这道题！

Invanka

看下
http://forum.chasedream.com/GMAT_SC/thread-446223-1-1.html?SearchText=GWD2%2030#last

recoupsin

A比E好很多。这题我看没有什么争议。
大家都知道not。。。so。。。as。。的用法吧。
an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications
so much as 实际上功能与形容词相似，也就是修饰前面那两个的。to certain medications, anxiety about travel, or stress before a job interview.这后面几个名词时并列结构。
而你所说的的not so much A， but B。
so much 是做形容词的，修饰A而已，一个小小的修饰成分，只是加强语气，而这种结构的主干是 not A， but B。
这种是名词的否定用法，大约有四中：
not A, but B.      A, rather than B。     not A，but rather B。   A， but not B