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The ozone layer must be protected because it shields the Earth from excessive violet radiations.

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  The steam engine is usually thought of as a relative modern invention, but the Greeks built a kind of steam engine when ancient times

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  For thousands of years, people have used some kind of  refrigerator cooling beverages and preserve ediblals

• I walked ___ the office. 

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  The first vaccine ever developed was used to combat and fight a smallpox, a disease resulting to infection by a virus.

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  Until Hollywood invented him, LeonardoCaprio was practically unknown.

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  I’m trying to save up for  Canada trip, so I can’t afford buying much at the moment.

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  Since light spreads out in all directions, light viewed from a great distance appearing dimmer than actually is.

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  Believed that Jack had got home safely, we felt so relieved.

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  People with exceptionally high intelligence quotes may not be best employees since they become bored of their work unless the job is constantly changing 

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  Most modern barns are both insulated equipped with electricity

• Choose the correct answer to complete the sentence. " In spite of poverty and dreadful conditions, we still manage to keep our _________."

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  The international Red Cross, which has helped so few nations, won Nobel Peace Prize three times for efforts to reduce human suffering

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  We work with many people who are different from us because every persons are the only.

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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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  Gunpowder, in any ways the most effective of all the explosive materials, were mixture of potassium nitrate, charcoal, and sulfuric

• Choose the word(s) CLOSEST in meaning to the following word(s). "self-respect"

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  Light rays what enter its eye must be focused onto point on the retina in order for clear visual image to form .

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  The two men, disguising security guards, overpowered staff at the bank and escaped with 150,000 dollars

• Tom dived _______ the water. 

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  Villagers hope for raining this month after nearly the year of dry weather.