44.New theories propose that catastrophic impacts of asteroids and comets may have caused reversals in the Earth's magnetic field,the onset of ice ages,splitting apart continents 80 million years ago,and great volcanic eruptions.
b.the splitting apart of continents
c.split apart continents
d.continents split apart
e.continents that were split apart
我选c为什么不对呢?因为split也可以作名词的.但答案选b,左看右看都不像
特指,the splitting apart of continents
split apart continents, apart,adv, so split is verb here
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