PREP-1-59

59.   (27573-!-item-!-188;#058&003208)

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

选C,排除法做对了.

但as was the case的用法是什么讲究?

比较结构加倒装吧

as the case(.......) was