In its pure State, aluminum is a weak metal, but when combined elements such as copper or magnesium, it is formed alloys of great strength

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• If you “make” a “five-days” trip across the Atlantic Ocean, your ship “enters”  different time “zone” everyday.

• All almost electricity for industrial use comes from large generators driven by steam turbines.

• One decibel, which is a  unit of relative loud , is the smallest amount of change detected by human ear

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• He asked, “Why didn’t she take the final exam?” - He asked why ................ the final exam.

• The Library of Congress, located in the nation’s capital, houses history documents and photographs as well as most books published.

• The examination will test your ability understand spoken English, to read non-technical language, and writing correctly.

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

• Because of it consists only of relatively short strand of DNA protected by a shell of Protein, a virus cannot eat or reproduce by it self.

• We must be very careful with sensitive issues such like this, to avoid giving offence

• The most substances expand in volume when they are heated.

• In the 1920’s, cinema became an important art form and one of ten largest industry the United States.

• The measurement known as “food” has originally based on the size of the human food.

• Designers of athletic footwear finely tune each category of shoes to its particularlyactivity by studying motion and physiology.

• Her name is Jane, ________?

• Do it right now, ______?

• We didn’t eat here last week, ____ we?

• Some ofthe stiffest competitions the jackals face on plains of Africa comes vultures.

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

• The sun contains 99.9 percentage the mass of solar system.

• A calorie is the quantity of heat required to rise gallon of water one degree centigrade at one atmospheric pressure.