prep2008 174题求教

seachina

Often major economic shifts are so gradual as to be indistinguishable at first from ordinary fluctuations in the financial markets.

A.so gradual as to be indistinguishable

B.so gradual so that they can be indistinguishable

C.so gradual that they are unable to be distinguished

D.gradual enough not to be distinguishable
E.gradual enough so that one cannot distinguish them

请问为什么C选项不对啊，谢谢！

12604698

动作发起者没变，用so as to。。so that 的话that主语要和主句主语不一样。
而且c也啰嗦不简洁。

HarrisZheng

gmat不是要你挑没错的，而是五个里最好的