请教！！！老PREP154

柠檬麦胖兜

154. (33193-!-item-!-188;#058&006626)

Some patients who do not respond to therapies for depression may simply have received

inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be

effective or having been taken off a drug too soon.

(A) having, for example, been prescribed a drug at a dosage too low to be effective or having been

(B) having, for example, a drug prescription that was ineffective because the dosage was too low,

or being

(C) as, for example, having too low of a dosage of a prescribed drug for it to be effective, or being

(D) when they have, for example, been prescribed too low a drug dosage to be effective, or were

(E) for example, when they have a drug prescription with a dosage too low to be effective, or been

主语是patients，由who引导的定语从句修饰，宾语是treatment，后由for example引出两个treatment

例子。

两个并列的having ...所做的成分是？同位语？

主语是patients，由who引导的定语从句修饰，宾语是treatment，后由for example引出两个treatment

例子。

两个并列的having ...所做的成分是？同位语？

jackchr

having..做分词 some patients是逻辑主语

loveeyore

不明白。