Some cteria are extremely harmful, but anothers are regularly used in producing cheeses, crackers, many other foods.

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• It is their nearly perfect crystal structure that gives diamonds their hardess, brilliance, and transparent 

• Materials that of clay are among the most ancient manufactured articles and have played vital role in human civilization.

• To raise livestock successfully, farmers must selecting cattle for breeding and apply dietary regimen.

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

• Genetic engineering is helping researchers unravel mysteries of previously incurable diseases so that they can get root causes and find cures

• A pack of wild dogs ………… frightened all the ducks away 

• Find the mistakes and correct

  Hoover Dam in Nevada is multi purpose structure that provides flood control, hydroelectric powerful, and drinking and irrigation water 

• The average salt content seawater is more than three percent.

• Find mistakes and correct

  Life expectancy has increased the great deal in spite of modern medicine and technology.

• Now that they have successfully passed the TOEFL, the students were ready to begin classes at the University

• Some of the land in region is so wet and hot and covered with jungle that few people live there.

• When there are low sales, companies often decide developing new production

• To remove stains from permanent press clothing, carefully soaking in cold water before washing with regular detergent.

• Because silk is the strongest of all natural fibers, ranking in strong with synthetic fiber nylon, its delicate look and fell are deceptive.

• Each of the  nurse report to the operating room when his or her name called.

• It was suggested that Pedro studies material more thorough before attempting to pass the exam.

• So  when Whitman returned to the Pacific , overs thousand settlers went with him.

• Of the two lectures, the first was as the best, partly because t person who to delivered it had such a dynamic style

• Nancy said that she went to the supermarket before coming home.

• The United States became independent ________ England in 1776.