so that 疑问？

victoryzx · 发表于 2010-5-17 06:37:17

大全10. Climatic shifts are so gradual as to be indistinguishable at first from ordinary fluctuations in the weather.

(A) so gradual as to be indistinguishable

(B) so gradual 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

B选项为什么不对？记得前人帖子里提到过 so (that) 中的 that是可以省略的。

recoupsin · 发表于 2010-5-17 12:34:16

that 不可以省略。

so that 疑问？

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