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[请教] OG蓝皮语法 SC 100
请教选项B错在哪? OG解释没有看明白。谢谢高人
SC 100
Sixty-five million years ago, according to some scientists, an asteroid bigger than Mount Everest slammed into North American, which, causing plant and animal extinctions, marks the end of the geologic era known as the Cretaceous Period.
B. which caused the plant and animal extinctions and marks
E. an event that caused the plant and animal extinctions that mark (正解) |
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