大家看看这题应该选哪个

wei_wangyan

这不是PREP原题吗？答案是D，大家还争什么呢？

43. 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

C: but分句后面没有动词, 会让人产生和because they enhance … but …的歧义

but可以作连词，也可作介词。在这个句子里是用作连词的，not…, but…. 。但是C中的but可被看作介词（except的意思），产生歧义（即：enhance reproduction or survival, but by-products of..）。加上are后，说明but后跟句子，一定是not …but…中的连词。

D: correct

huyu03

哦，明白了。解释的真清楚，谢谢了

Zeldaw

I like D

mattus

呵呵，讲解真到位～