83．将(3)处划线部分的句子翻译成英文：

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84，Imagine what the future will be like．

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82．将(2)处划线部分的句子改为简单句：

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81．将(1)处划线部分的句子翻译成汉语：

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Well, Spaceship One is special because (2) it is the first spaceship that wasn’t made by the government．It was built and launched(发射) by a private (私人) US company．Lots of people want to travel in space．But it’s too expensive．American millionaire Dennis Tito paid almost US $20 million to become the first space tourist to visit the International Station in 2001．So private companies began to think of making their own spaceship to take other tourists up into space．

(3)飞船一号的成功是一个好的开端。In the next 10 to 15 years, if you pay $20,000 to $100,000, you could fly high above the earth．

What about having your own spaceship in your garage(车库) and taking into space at the weekend?

Spaceship One is a 6-meter-long white spaceship．On June 21．American pilot Mike Melville flew it to space and back-about 100 kilometers up into the sky．(1) Some might say it’s not a big deal．Yow know, people went to the moon years ago．

71．w________  72．p________  73．r________  74．d________  75．l________

61．________    62．________    63．________    64．________    65．________

Many people(61) ________(see) a comet(彗星)．However no one(62) ________(know)how many comets there are．There may be millions of comets, but only a few comets close enough for us (63) ________(see)．Even then it is not often that a comet comes close enough to be seen if we do not have a telescope．An Englishman，Edmund Halley who lived from l656 to 1742, (64) ________(find) out a lot about the paths(轨道)that comets comes through the sky．Some comets move out of our sight(视野) and never come back．Others keep (65) ________(come) back at regular times．A big comet (66) ________(name) after Halley because he was the one who (67) ________(work) out when it came back again．You have never seen Halley comet because the last time it (68) ________(come) close to the sun and the earth was in the year l986．Then people all over the world were outside at night (69) ________(look) at it．Probably you (70) ________ (be) able to see Halley comet when it comes near the earth．