此题要求改正所给短文中的错误。对标有题号的每行作出判断;如无错误,在该行右边横线上面一个勾();如有错误(每行只有一个错误),则按下列情况改正:
该行多一个词:把多余的词用斜线(/)划掉,在该行右边横线上写出该词,并也用斜线划掉。
该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。
该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。
注意:原行没有错的不要改。
Balloons have used for sports for about one hundred years.
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There are two kinds sport balloons, gas and hot air.Hot air
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balloons are preferred by balloonists because of their safe.
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They are also cheaper but easier to manage than gas balloons.
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Sport balloon flights are best early in the morning or late
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in the afternoon when a wind is light, and pilots must watch
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the weather more carefully.Over the years, balloonists have
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tried again and again to cross the Atlantic Ocean.It was until
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1979 that three American balloonists succeed.It took them just
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six days to make the trip away from the States to Paris, France.
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