请教

EMINEM830505 · 发表于 2009-11-2 17:16:17

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
(E) gradual enough so that one cannot distinguish them

dengyichao · 发表于 2009-11-2 22:00:10

选A吧

EMINEM830505 · 发表于 2009-11-9 16:07:34

对哈^^A

aeoluseros · 发表于 2009-11-9 16:08:34

umm..lz的问题是? 发帖记得格式哦，方便后人research.

EMINEM830505 · 发表于 2009-11-9 16:09:37

好的哈^^谢谢版主提醒^^

请教

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