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The teacher decided to fail the student with backgrounds of his poor performance in tests and too small progress

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In winter the weather is important for farmers to provide food and warm for their animals.

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John’s teacher encouraged him taking part in the international piano competition.

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In late 1840, Joseph Henry made important discovery of electromagnetism.

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In spite of their size, multinational corporations often make products at lower costs than local industries can.

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This is Dr. Ash calling. If anyone asks for me while I am away from the hospital, ask them to call back after 5 this afternoon

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It has been found that length light or dark periods influence certain activities of flowering plants .

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Located in Canada, the Columbia Ice field covers an 120 square miles and is 3,30 feet thick some places .

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Nomadic hunter and gatherer societies can access to only a limited amount of food in an area and moved on when they have exhausted each locality.

These are documents________your study. 

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With above 20,000 species, the world’s an has continued to increase as other animal populations have declined.

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More than  10,000 years ago, glaciers moved (across the Minnesota region four time, leveling most of land.

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The mosquito has needle-shaped mouthparts that piercing the skin to suck human blood.

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A thunder often follows lightning by five seconds for every mile between the flash and the observer.

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Not one in one hundred children exposed to disease are likely to develop symptoms of it.

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Do think that humans will ever be able to live other planets?

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The amount of books in a Library of Congress is more than 58 million volume tapes.

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He never goes home before he will finish the work 

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Carlos was ………. the first prize in the essay competition.

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How much times did Rick and Jennifer have to do the experiment before they obtained results they had been expecting?

He threw the letter _____ the fire.