GWD2-30求助

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

答案是E，但是有几个地方我想不明白。

1. not...but结构应该平行，可是选E的话变成 not+n+but+adj，这样对吗？

2. symptomatic of,  of 不应该两端都是连接名词吗？

3. maybe 出现不都是错的吗？而且原句中并未有maybe这个词，随意添加情态动词不是改变愿意吗？

c的错误在于problem as simple as when 不对称

1，这样的平行结构是可以的，

2，不一定，两端接名词只是of的一种用法，of可以在许多短语里面放在形容词后面

3，maybe是个问题，先忽略把，感到c的错误比较硬伤。。

我一眼看也是想选A，因为有so much as...

但这样that修饰的部分就改变了，是another problem而不是insomnia了。

我是这么想的……事后诸葛亮……