There is a wide_________ of computers in that shop for you to choose.

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The instructor advised the students for  procedures to follow in writing the term paper.

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People who exercise regularly are less likely to develop heart disease than is those who do not keep fit.

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Tucked away in the mountains named Bolivia and Peru, Lake Titicaca are the highest navigable lake in the world

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Pigeons, like many migratory birds, read the positions of Sun and stars in order to orient them.

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It’s time you went home, but I’d rather you stay here.

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The medical science began with the Greek Hippocrates, who earned for himself title of father of Medicine

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Malnutrition is a major cause of death in those countries where one cultivation of rice have been impeded by recurrent drought .

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Public health experts say the moneyavoiding illness is less than the cost to be sick

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It was after shortly microscopes were introduced at the beginning of the seventeenth century that micro organisms were actually sighted.

In the future many large corporations will be wiped out and millions of jobs will be lost.

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On February 20th, 1962, “Friendship 7” orbiting the Earth in manned flight that lasted just under five hours

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Food prices have raised so rapidly in the past few months that families have been forced to after their eating habits.

As I .................... the glass, it suddenly ...................... into two pieces. 

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The skin receives nearly the third of the blood pumped out by the heart.

Andrew .................... the test before so he...................... it very easy. 

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In human beings, as in other mammal, haround the eyes, in ears and in nose prevent dust, insects, and other matters from entering these organs.

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Dinosaurs are traditionally classified as cold-blooded reptiles, and recent evidence based on eating habits, posture, and skeletal structuralsuggests some may have been blooded.

She showed her___________by asking lots of trivial questions.

Mark the letter A. B. C. or D to indicate the correct answer to each of the following questions.

It's a nice day. Does anyone fancy ____ for a walk?

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The Carbon atoms of diamond are so strongly bonded that diamond can only be scratched with other diamond.