同学,很高兴回答你的问题
正确答案如下：
1.What he discovered has not yet been proved.
2.Whether the other astronomers accept his ideas remains a question.
3.How the first appearancea of life on earth mystery is still a mystery to scientists.
4.Why the earth is becoming warmer is an important topic for research..
5.It amazed everybody that Stephen Hawking at 65 experienced zero gravity during a flight.
6.It is a surprise that plauto is no longer considered a planet in our solar system.
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