prep07里关于not，but的一个疑问

sjray637 · 发表于 2015-9-12 12:47:34

PaleontologistStephen Jay Gould has argued that many biological traits are not the productsof natural selection, favored due to their enhancement of reproduction orsurvival, but that they are simply random by-products of other evolutionarydevelopments.

(A) due totheir enhancement of reproduction or survival, but that they are

(B) due tothe reproduction or survival they enhance, but they are

(C) becausethey enhance reproduction or survival, but

(D) becausethey enhance reproduction or survival, but are

(E) becauseof enhancing reproduction or survival, but are

前面那句话是are not，为啥后面是but are呢，就是B和C选项的差异，答案选C，求解释

KILLJQB · 发表于 2015-9-25 10:38:22

答案选D
favored because they enhance。。。。是插入语，
many biological traits are not.... but （many biologica）are 平行
类似i stay at home and play computer games
and后面省略主语I

SCFFGMAT · 发表于 2015-9-25 17:02:30

(C) becausethey enhance reproduction or survival, but
C中句子会出现歧义，PJCG has argued that many biological traits are not the products, (favored because they enhance reproduction or survival),but (because they are) simply random by-products of other ##. 或者可以理解
PJCG has argued that many biological trait are not the products (--), but(biological traits are) simply random...
C在语法上是可行的，但是相比之下D更好。

prep07里关于not，but的一个疑问

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