题目是这样的: 93. 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,但是我选的是C。A不是很wordy吗,大全的解释是这样的:Choice A is best: is links the noun schistosomiasis with its modifier, debilitating, and so debilitating that idiomatically introduces a clause that provides a further explanation of debilitating. Choices B, D, and E produce awkward, wordy, imprecise, or unidiomatic phrases by substituting the noun debilitation for the modifier debilitating. Choices B and D fail to introduce the explanatory clause with that, and C uses an awkward and wordy construction in place of a that... clause. Finally, B, D, and E wrongly use economical instead of economic to mean ―pertaining to the economy.怎么都看不太明白,有没有大虾站出来点拨一下~~
Although schistosomiasis is not often fatal, 后面应该跟schistosomiasis平行的名词主语,这里的it其实也就是指代schistosomiasis。所以C直接用SO就没有了主句的主语。而且so adj is it as to没有这种结构的,太wordy了,直接用so that结构就能替代表达相同意思了。GMAT的原则就是意思相同的情况下最concise