Choose the correct answer to complete the sentence. "At last, Huong made a ________ effort to get a scholarship so that he could have chance to study overseas."

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Drug abusement have become one of America’s the most serious socially problem.

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Martin Luther King Jr.’s magnificent speaking enabling him to effectively express the demands for social justice as Black Americans

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We ________English this time last week.

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Gwendolyn Brooks, which won a Pulitzer Prize in Poetry in 1950, had 75 poems published by time she was twenty.

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Today’s nuclear fission fuels are the remnants of which used to be a much more active mixture of radioactive and fissionable materials two billion years ago and maybe earlier.

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I have already shopped for food twice this week, so I _________do it today.

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No one would have attended the lecture if you told the truth about gue speaker.

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

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You have to study really hardly is you don’t want to fail your exams .

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Keep trying to learn English. Don’t give up. Eventually , you will succeed, even though you may not know how much time it costs.

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Most modern barns are both insulated equipped with electricity

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Many theories on conserving the purity of water has been proposed but not one has been widely accepted as this one.

Governments should bring up international laws ____ terrorism. 

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President Wilson had hoped that World War I be the last great war, only two decades lately, the Second World War was erupting

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While studying the chemistry of human body, Rosalyn Yalow won a Nobel Prize for the research she conducted on role of hormones.

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Time is of few count relation to great thoughts that are as vivid today as when they first passed through the author’s minds ages ago

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Sue bought a CD player last week and she has been listening to music ever since then.

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Many roads and railroads were built through the 1880s because of industrial cities needed a network to link with sources of supply.

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............. is a group of countries or parties with similar political interests.

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Nuclear energy, inspite early promise as a source of electrical power, is still significant in compared with older and safer energy sources.