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69. Sixty-five million years ago, according to some scientists, an asteroid bigger than Mount Everest
slammed into North America, which, causing plant and animal extinctions, marks the end of the
geologic era known as the Cretaceous Period.
(D) an event that caused plant and animal extinctions, and it marks
(E) an event that caused the plant and animal extinctions that mark
我在D E之间纠结,这是解答:
D. and it marks….完整独立句子,构成run-on错误;it指代不清,可以指代an asteroid,也可以指代,an event,且 it 优先指代同在句子中充当主语成分的 an asteroid,不符合逻辑。
E. 正确。
我的疑问,请问D中不是有and了吗?为什么会有run on的错误呢?
还有it的指代问题,难道不是指代离他更近的an event呢?为什么会指代不清啊,指代问题我总是错。。。
E中我的疑问是that mark,这里的that我怎么觉得不清楚呢?可以是animal extinctions,也可以是the plant and animal extinctions?
求讲解,谢谢各位啦!
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