prep1-59，prep1-74

(A) produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but/

(B) produced not by profit-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but/

(C) produced not by profit-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by

(D) not produced by profit-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by

(E) not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

选C

语法笔记上说D选项的was not produced by…, but was produced by结构不平行

prep74：

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

选D

但是用的就是这个are not....,but are ....结构， 为什么59题用这个结构就是错的呢？

谁能告诉我啊 谢谢了·······

not but 强调的是“不是，而是”，produce是两者相同的部分，没有必要进行什么比较，两者之间不同的是seed companies和university and United States Department of Agriculture researchers

你的意思就是说59题D选项比较啰嗦，所以是错的，对吗？