PREP2008 语法笔记里的一个小bug？

asjdw

今天做题，发现174题里的题目中，下划线部分和选项A一样？

另外，对于选项C的解释：C.able/unable to be done的结构错误
没看懂。

原选项 C.so gradual that they are unable to be distinguished 我觉得如果说这个选项是错的，顶多是个wordy 吧？






原选项 C.so gradual that they are unable to be distinguished 我觉得如果说这个选项是错的，顶多是个wordy 吧？







174.
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(A)

E.gradual enough so that one cannot distinguish them



选项分析：A.Correct. 主句为简单主系表结构

B.so...so that搭配错误(Incorrect Idiom)

C.able/unable to be done的结构错误

D.enough偏向于主观判断，不符合逻辑语境；not to be distinguishable不如to be indistinguishable简洁

E.enough so that错误搭配(Incorrect Idiom)