请教prep－129

129. 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

请教选B错在哪里？

B. having, for example, a drug prescription that was ineffective because the dosage was too low, or being taken off a drug too soon.

不对称

真是头大！

以前只要是完成时态变分词都是说错的，我都把它作为绝对错误了，这里怎么成了正确答案了：（

而经常要求平行结构的绝对一致，这在以前OG 和大全里都是可以松动的。

SC世界里还有绝对错误吗………………

这里之所以说不对称，是因为前面是主动语态，后面是被动语态，这样恐怕不妥。

而A都是被动语态，比较之下，也是A好的。

BTW，偶最不喜欢的就是BY和LZM的“永远错”。。。

BTW，偶最不喜欢的就是BY和LZM的“永远错”。。。

但是这个being的用法确实从来在gmat的选项中没有对过，

我当初选的是D，

如果让我在having been done和时态不一致上选，我宁愿选时态不对称的。

不过D中prescribed too low a drug dosage to be effective 的表达没有A清晰，会不会是这个问题？

没这么绝对的

being引起被动的时候在正确选项里面出现过，某位大N JJ的笔记还特地标出来了这一点

还是wei JJ的那句：没有所谓的“永远错”

“表达不清晰”恐怕不能算一个选项的致命伤，尤其在几个选项都看上去不完美的时候。

这个题的D，除了时态上不对称（现在完成时与过去时并列have been prescribed... or were taken off...），偶认为还有一点不好，就是没能表达原文的意思。

因为D（E也是）项中的when...引导的是时间状语从句，是指前面主句所述内容在when...这种情况下发生，但原文的意思（尤其是用了for example）是列举了两种inadequate treatment的情况（用了动名词形式），而不是在什么情况下会receive inadequate treatment。

一家之言。