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Duke University in North Carolina has  an outstanding collecting documents concerning Southern history.

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Since a computer was invented, work of accountants have been simplified.

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In the past years, high _____________ growth has enabled Viet Nam to increase people's living standards.

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It is necessary that you ____ able to come with us.

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This will have some serious effect about agriculture

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As a poetry , Nikki Gio makes effective use of jazz and blues rhythms.

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Everyone should act ………… in order to protect our environment.

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Halifax is largest city and chief port of Nova Scotia and is eastern terminus of Canada’s two great railway systems.

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Usually the climate mountainous area become much windy at higher altitudes

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Designers of athletic footwear finely tune each category of shoes to its particularly activity by studying human motion with physiology.

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After a while, track we have been following became thick underground .

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Mosquitoes are such fast breeders that it almost possible to control them either draining areas where they breed or to spary them with pesticides.

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Many mobile factories have found that human operators work more effective than automated ones in regard to flexiblility decision making.

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The most (substances expand in volume when they are heated strongly .

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Air pollution, together with littering, are causing many problems in us large, industrial cities today.

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Woody Guthrie has wrote thousands of songs during the lifetime, few of which became classic folk songs .

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There is no limit to the diversity to be finding all the cultures of people throughout the world.

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In a nuclear family, both mother and father have responsibility for housekeeping and ____.