Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.
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AFive hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.
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BNearly 99 percent of five hundred million different species of living creatures that appeared on Earth have vanished.
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CVanished are nearly 99 percent of the five hundred million different species of living creatures that appeared on Earth.
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DOf five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent of them have vanished.
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EOf the five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent have vanished.
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正确答案: E