The origin of life on earth is question that interests astronomers.A．the; the B．\; aC．\ ; theD．the; a 题目和参考答案——青夏教育精英家教网—

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The origin of ____ life on earth is ____ question that interests astronomers.（原创）

A．the; the

B．\; a

C．\ ; the

D．the; a

略

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