Sixty-five million years ago, according to some scientists, an asteroid bigger than Mount Everestslammed into North America, which, causing plant and animal extinctions, marks the end of the geologic era known as the Cretaceous Period. (A) which, causing plant and animal extinctions, marks (B) which caused the plant and animal extinctions marking (C) and causing plant and animal extinctions that mark (D) an event that caused plant and animal extinctions, which marks (E) an event that caused the plant and animal extinctions that mark
我在纠结DE选项: D选项 marks是单数谓语,那么which就肯定跳跃修饰 an event了, E选项 that mark 附属谓语,肯定修饰extinction了。 因此我就选不出来了。
不管你跳不跳跃(一般考虑就近指代,an event和extinctions意思是一回事,看是否跳跃根据主谓一致,先放着,实在没的选再选他),D中,which是一个非限定性定从;而E中the plant and animal extinctions that从the和that限定性定从都是强调这一次事件的重要性,标志着Cretaceous Period的到来,so E is the best choice
不管你跳不跳跃(一般考虑就近指代,an event和extinctions意思是一回事,看是否跳跃根据主谓一致,先放着,实在没的选再选他),D中,which是一个非限定性定从;而E中the plant and animal extinctions that从the和that限定性定从都是强调这一次事件的重要性,标志着Cretaceous Period的到来,so E is the best choice