PREP154，晕晕晕

hebelong

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

OA: A，but what about B?笔记上说“having a drug prescription与being taken off不对称”怎么不对称了？还有为什么要用HAVING BEEN被动语态哦？？？谢谢你们的回答，大家要加油！把语法提高提高再提高！

WO爱逍遥

我一般 看到 BEing  就排除了  虽然有时候是正确答案

但比较节约时间

chasekai

个人理解应该是B中having表示“有”，being是助动词（后面有taken off），作用不同不能平行。

hebelong

个人理解应该是B中having表示“有”，being是助动词（后面有taken off），作用不同不能平行。

-- by 会员 chasekai (2011/5/17 14:08:31)

oh~i see~thanks~