请教OG10 136

cooperqi

136. 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

想请问大家这道题目选择A而不选择C的原因是因为so that优于so as to吗？谢谢。

xueguelili

so as to 要求前后比较的对象逻辑主语完全一致

在这里显然不是这样

就考虑使用so that

cooperqi

so as to的逻辑主语和主句主语不都是那个血吸虫病吗？怎么解释啊？谢谢。

simbachu

没,这里是只用错了而已,so debilitating is it as to 中间的is it多余了

cooperqi

楼上说的我很同意，但是我还是有一个疑问：我觉得A选项里面的it是多余的，请

各位指教啊。