求助：SC1000 12 whether引导的从句？

AlexYYY · 发表于 2013-2-1 10:55:35

12. A little under a million years ago, the briny waters of the Baltic Sea began flooding into the cold North Atlantic: geologists are still debating whether the flood was gradual or created a cataclysm.
(A) whether the flood was gradual or created a cataclysm
(B) if the flood was gradual or created a cataclysm
(C) about whether the flood was gradual or cataclysmic
(D) whether the flood was gradual or cataclysmic
(E) whether the flood was gradual or it created a cataclysm

答案是D，可是谁能帮我解释E错在哪里啊？ it在这里不是可以指代the flood么？
同时哪位帮忙讲解一下whether引导从去的特点么？ thanks

Gluttony · 发表于 2013-7-14 16:16:51

or 前后要平行吧，所以排除ABD

求助：SC1000 12 whether引导的从句？

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