说说OG13上我不懂的解释，请牛牛帮帮忙

enchanter木

请问是否 so 。。。as 。。。。。todo通常用于否定句？

wangwei1128

倒过来看 it is so as to

lorinlee

D项明显是两个句子，没有连词，直接排除

weh232

37.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

关于这个问题一小点疑惑，B项OG解释的是debilitation的意思和愿意不同，是不是因为是名词不好的原因。

-- by 会员 小皮球PAL (2012/11/21 16:47:59)

我最大的疑惑是后面的从句为什么用完成时，为什么不需要和主句保持一致