Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.
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Q39:Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.
the answer is E,I choose B
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the answer in my document is B, I choose E
E is beter than B,
B used Appeared, E used have appeared, since 1% of the species are still appearing, so have appeared is better then appeared
After discussing with some english teachers from Cornell, I picked E as the final answer as last.
In B, that is ommitted before appear.
E is the best answer we can find out of these choices given
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