作者：英吉
A new genetically engineered papaya was 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 university and United States Department of Agriculture researchers who allowed growers to use it free of charge.
(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
原文意思：一个东西不是什么生产的而是什么生产的。
大致意思：应该有一个not but的并列，A前面是not by而后面是but没有by，和前面不对应，干掉。B but后面也没有by，干掉。C not by后面说but by写的还挺对应，留着。D not produced by but后面加was produced by，没必要重复这个动词，干掉。E 前面是not produced而后面but没有动词只有by，写的不对应，干掉。
