69. (28208-!-item-!-188;#058&003886)
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  eriod.
(D) an event that caused plant and animal extinctions, and it marks
(E) an event that caused the plant and animal extinctions that mark 正确答案:E 解析: 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。
1.请问何谓run-on错误??? 2.请问为何it优先指代asteroid,为何不是临近指代evevnt?
多谢赐教!!!   |