OG15

15. In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings. which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis.

(A) mood swings, which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis

(B) mood swings, perhaps violent without being grounded in mental disease, and genuine manic-depressive psychosis ,

(C)between mood swings, which may be violent without being grounded in mental disease, and genuine manic-depressive psychosis

(D) between mood swings, perhaps violent without being grounded in mental disease, from genuine manic-depressive psychosis

(E)  genuine manic-depressive psychosis and mood swings, which may be violent without being grounded in mental disease

The best choice is C because it uses the idiomatically correct expression distinguishes between x and y and because it provides a structure in which the relative clause beginning which may be violent clearly modifies mood swings. The other choices use distinguishes in unidiomatic constructions. Additionally, their in A is intrusive and unnecessary, and the modifier of mood swings in B and D (perhaps violent) is awkward and less clear than the more developed clause which may be violent.

答案C没有问题。我的问题可能有些愚蠢。就是E为什么不可以，似乎改变结构以后，which修饰mood swings有歧义吗？ 活着说字少的要放在前面？谢谢！

distinguish between A and B，其中between不能少，E的致命错误；

which的指代不明，如你所言，另一个错误。

字多字少不是关键问题，关键在于结构是否合理，修饰是否明确。

which的指代还是明确的，a and b,which结构，which 修饰b

一不留神已经有两位哥哥回答了。谢谢了。

stoneren gg 所指的“distinguish between A and B，其中between不能少，E的致命错误“的问题，我担心我考试时真会犯这样的错误。明明知道还当看不见，要命。

另外，有关which 的解释让我很明白了。将来看到这样的题目的时候可能不会在错了。但是自己写的时候就保不住了。记住了。

谢谢！

精辟!感谢诸位大人.