短文改错
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What is the sky? Where is it? How high is it? Which lies |
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above the skey? I am sure that you have asked questions, as |
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these. They are very difficult to answer them, aren’t they? |
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Perhaps we can answer some these questions now. |
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What is the sky? It is vast space. Where is the sky? It is |
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all around the world. On the sky there is |
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the sun, the moon, and stars. |
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Scientists have always want to know |
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more on space. They use telescopes to |
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obtain an information. But this is not enough. So they want |
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to send men to some of the other worlds in space. |