[求助]OG12 SC 37 关于倒装

Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries.

(A)it is so debilitating that it has become an economic
(B)it is of such debilitation, it has become an economical
(C)so debilitating is it as to become an economic
(D)such is its debilitation, it becomes an economical
(E) there is so much debilitation that it has become an economical

答案是A

so that 和so as to 的区别是，so as to 要逻辑主语一致，而so that 不需要，但是这题，so as to的逻辑主语是对的，就是it， 因此没有问题。

请问各位NN 为什么不选C

首先倒装是表示强烈语气的，如果原文中有倒装的尽量不要去，没有的，也不要贸贸然补。

其次（这个有点经验主义的味道，不作数），不过做到几道类似的题目感觉ETS偏爱SO....THAT一点  哈哈

C的时态也不对啊 完成时显然要更好

就算C对 也不如A好

老见到有人问为啥X不对啊 记住 GMAT永远是选最好的答案 不是选绝对正确的

我的疑问：

(A)it is so debilitating that it has become an economic
(B)it is of such debilitation, it has become an economical
(C)so debilitating is it as to become an economic
(D)such is its debilitation, it becomes an economical
(E) there is so much debilitation that it has become an economical

A,B, 都有两个it，而且明显两个it指代对象不一致，前一个it 指代 后面一段话，后一个it指代 前面的一个名词，为什么还选A?

B是不对的，把B选项带进去

Although schistosomiasis is not often fatal, it is of such debilitation, it has become an economical drain on many developing countries.

2个主谓完整的句子放在一起了