(单选题)

How long does the Earth need to restore the lost diversity of species after a great crisis according to recent research?

A.About 10 million years.

B.21 centuries.

C.A life-long time.

D.It could never be restored.

参考答案：A

参考解析：

细节理解题。根据最后一段倒数第三句“Recent research shows that Earth needs about 10 million years to restore the lost diversity of species after a great crisis.”可知，地球在经历了一场大危机之后，需要大约1000万年的时间来恢复失去的物种多样性。故选A。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语