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Four minutes.
He believes in the future, millions of people will live and work in space.
By moving polluting businesses away from the Earth and into space.
Because rockets create huge amounts of pollution(as they burn tons of fuel in order to fly into sky.
I think it can help us protect the planet.(言之有理即可)


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 A hero in my heart 
    Everyone has a hero in his heart. Some heroes can be great people, while other heroes may be common people. As for me, my father is my hero.     
    My father is an English teacher. He is tall with short hair.Although he is just an ordinary person, he has taught me a lot during my growth. I once failed my final exam. I was so afraid that I wanted to find excuses for my failure. My father was very angry,but not for my failure. He told me that I should face my problems bravely. He helped me find out my weaknesses, and think about ways to overcome them. From then on, I knew the true meaning of courage. It doesn't mean that I am not afraid of anything but I can face my problems bravely instead of running away.
    Thanks to my father, my hero, I can face all the problems bravely and become a person like him.
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