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.
an illness or a physical condition so much as a symptom of another problem that may simply be a reaction to certain medications
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
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
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
so much an illness or a physical condition but symptomatic of another problem, maybe simply a reaction to certain medications
GMAT中like可以和such as 一样用来举例的!!!!
D是错在but it is和前面的not 不平行, not... but..
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