[求助]语法 一道

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

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

Of the five hundred million different species of living creatures that have appeared on earth nearlyl99 percent have vanished.

答案是最后一个

同样郁闷.  偶想不同这个HAVE APPEARED.   用ONCE APPEARED 明显好一点吗?

1，A是have appeared，E用have appeared没有改变意思，D的appeared改变了意思。

2，D的定语从句有修饰模糊的嫌疑。

这题，我好像昨天在哪里见过。

五个选项只有：Of the five hundred million different species of living creatures that have appeared on earth nearlyl99 percent have vanished.最合适。

所以，答案只能是在比较出来的。所以，问题，就一定要把题目贴全了。