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. 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

参考答案：E

我感觉有问题，应该把but改成as才成立，考虑到[not so much---as--- = 与其说，不如说]，不知道有没有not as much---，but的结构；要不然是not---，but---的结构，但是也不对呀，E也没哟符合平行对称呀。

迷惑。

对呀，我也觉得E有问题。如果是not...but...的结构so much在这做什么？而

且确实不平行。