Choose the correct answer to complete the sentence. "They do this _____ watching and listening."

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When scientists discovered how soap works, it became possible to do synthetic detergents of Petroleum.

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Many illnesses in refugee camps are the result of inadequate sanitation.

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When he took the ticket out of from his pocket, hundred dollar bill fell to the floor without the noticing.

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Hoa ____ feed the cats because her mother has done it already.

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Inventing by Roger Bacon, the magnifying glass has led to creation of other scientific tools which have produced immeasurable scientific progress.

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The mayor and the council, meeting at city hall as usual, they did not discuss the proposed new sports complex like planned.

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When you passed the town hall clock, did you notice the time was it ?

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Dislike us , they are not so interested in sports and fitness activities

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Having lived here for seven years, my friend is used to speak English with all her classmates

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Humus is formed during soil organisms decompose animal and plant material into usable elements by plants .

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Pele encourage Ronaldo to take part in 2008 World cup.

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

He laughed………….when he was watching “Tom and Jerry” on TV.

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One inventor that Thomas Edison can take credit for is a light bulb.

Canned goods and condensed milk became more common during the 1860's, but supplies remained low because cans had to be made ___ hand. 

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I suggest that Peter ____ the directions carefully before assembling the bicycle.

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Even the smallest pulley can be done stronger by adding wheels to them system to create more leverage

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

In Vietnam, Tet is the grandest and most important ………… in the year

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After the police had tried unsuccessfully determine to who car belonged, they towed it into the station