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题库 / Prep2007E2-SC-122
The features of the floor of the Kasei Valles on Mars look just like those at the base of Antarctic ice streams, so it suggests that possibly it was flowing ice that carved the giant Martian channels previously attributed to cataclysmic floods.
so it suggests that possibly it was flowing ice that
a suggestion that flowing ice may have
to suggest flowing ice as possibly having
suggesting that flowing ice may have
which is suggestive of flowing ice having possibly
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毕佬，D选项宾从后面的谓语是不是打错了？flowing ice不应该是不可数名词吗？后面的have是不是应该为has？最开始就排除了D，求解。
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