prep1-74

llxx1985cn

74.   (28503-!-item-!-188;#058&003635)

 

Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored due to their enhancement of reproduction or survival, but that they are simply random by-products of other evolutionary developments.

 

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

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

(C) because they enhance reproduction or survival, but

(D) because they enhance reproduction or survival, but are

(E) because of enhancing reproduction or survival, but are

Answer: D

两个问题：1。but are中间不用主语they吗

                   2。E为什么不可以？

llxx1985cn

up

玫瑰

问题一：主语相同，所以就省略拉。

问题二：because从句优先性大于because of，