GWD2-Q30

sunniers

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.

A.    an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications
B.    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
C.    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
D.    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
E.    so much an illness or a physical condition but symptomatic of another problem, maybe simply a reaction to certain medications
从ABE中选正确的,不知道为什么E是正确的

mereimoun

not ...but 结构平行

sunniers

maybe simply a reaction to certain medications
这东西如何能和前面的衔接?

xiaotangyu

知识点：，or  或者，and:   为甚么要有一个“，” 逗号 在and 或者or前?
因为在and, 或者 or 前面加上逗号表示一个三重以上的并列，我们比较 A and B and C 肯定会产生歧义，我们很难弄清楚到底是A,B,C互相并列，还是A 和B并列后再和C并列，或者是 A和BC的一种并列，这里我们可以看到有种说不清楚的感觉。这个就是GMAT的大忌，严格不允许有歧义。 根据这个并列原则，我们看到：’, anxiety about travel, or stress before a job interview’ 都是一个名词加介词再加名词的结构， 即 about 旅行的焦虑，before 工作前的压力，我们和容易找到只有a reaction to certain medication 才符合这样的结构
并列   not so much, but symptomatic
在这里这两个词 so much 和symptomatic 都是形容词性，not,but 没有任何的不对称。
SO is a adv
Much is a adj

taohuaxian

This is question is more about parallelism instead of about idiomatic expression. Though correct idiomatic expression is "not so much X as Y". Since none of choices reflect this Idiom, hence directly go for parallel structure.

Between option (C) and (E), only option (E) has correct parallel structure. Let's breakdown each option to have more clear view.

Option (E) has parallel structure of noun phrases: may be simply X, Y, or Z where X, Y and Z are noun phrases.

X = a reaction to certain medications
Y = anxiety about travel
Z = stress before a job interview

Also symptomatic of another problem is not awkward at all though we have rarely heard this word before but it's usage is correctly mentioned over here.

Whereas Option (C) does not have the parallel structure: that may be as simple as X, Y, Z where

X = Adverbial phrase (when certain medications cause a reaction)
Y = Noun phrase
Z = Noun phrase

Hence go for option (E).

Hope this helps...