求助一语法题

sjj123 · 发表于 2011-3-4 10:09:40

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.

(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, and it marks
(E) an event that caused the plant and animal extinctions that mark
正确答案是E，可是我不明白的是，mark为什么用谓语动词的复数形式呢

emilyz0301 · 发表于 2011-3-4 10:18:45

plant 和 animal并列，用来修饰extinctions,extinction是mark的主语

hhou · 发表于 2011-3-4 10:18:48

我觉得....mark应该指的是extinctions

an event导致了extinctions, 然后extinctions标志了geologic era的结束

所以用复数

Alice2010 · 发表于 2011-3-4 20:37:14

到底是怎么回事呢

joyous314 · 发表于 2011-3-4 20:51:08

第一个that修饰an event，第二个that修饰extinctions，所以extinctions是marks的逻辑主语，所以要用复数形式~

jianglindenise · 发表于 2011-3-24 21:06:30

我觉得....mark应该指的是extinctions

an event导致了extinctions, 然后extinctions标志了geologic era的结束

所以用复数

-- by 会员 hhou (2011/3/4 10:18:48)

个人觉得这样的解释很好~~

赞一个~~~

求助一语法题

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