请教。。。

southnorth

Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.

A. Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.

B. Nearly 99 percent of five hundred million different species of living creatures that appeared on Earth have vanished.

C. Vanished are nearly 99 percent of the five hundred million different species of living creatures that appeared on Earth.

D. Of five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent of them have vanished.

E. Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent have vanished.

我更喜欢B，大家觉得呢？

yuminjia

以下是引用southnorth在2009-1-17 20:54:00的发言：

Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.

A. Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.

B. Nearly 99 percent of five hundred million different species of living creatures that appeared on Earth have vanished.

C. Vanished are nearly 99 percent of the five hundred million different species of living creatures that appeared on Earth.

D. Of five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent of them have vanished.

E. Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent have vanished.

我更喜欢B，大家觉得呢？

E中的现在完成时好象好点 如果是过去时的话B 99%的曾经存在地球的生物消失了 但消失用的是现在时态 所以感觉存在的生物应该是保持延续的 用现在时态好

southnorth

所以感觉存在的生物应该是保持延续的

appear能用延续性来形容？这个。。。。

昨天请教了老外，他说不喜欢B的语序，我觉得语序没什么问题呀？

鑫淼秋情

来自Manhattan论坛的解释
I'd go with E. Besides being generally awkward, B has a verb tense issue. It says "species that appeared" on earth. Appeared is simple past but, in this case, we want present perfect. We use past tense to discuss something that is completely over; we use present perfect to discuss something that started in the past but is either still true or still going on in the present. It is still true that the species appeared, so we want to say "have appeared" - which answer E does use and answer B does not.
不过对这个B的时态的理解也不是太清楚

nickddss

考现在完成时的基本定义，其中之一为：
describes an action that occured at an indefinite time in the past.

B中主语和谓语间隔距离太长。同时appeared（一般过去时）的基本意义只有一个，就是强调动作结束。

D 中 of them重复

C中错误在于vanish是vi.不能以被动语态出现。