Most of the magnesium used in the United States comes from the sea water.

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• You frequently see this kind of violence on .................. television. 

• If a glass lizard loses its tails , a new one grows to replace it

• In a person’s lifetime, the brain can store 100 trillion pieces of informations.

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• I work in a large office with about thirty other people, most of whom I know quite well enough.

• Fee Nitrogen is chemically inert and combines with other elements only since very high temperature or pressures.

• Due to the government’s policy, some farming are as have been abandoned

• If people stop destroying animal's natural habitat, more species will survive and produce .......

• Chicago’s Sears Tower, now the tallest building in the world, rises 1,522 feet from the ground to the top of it antenna.

• Before the invention of the printing press, books have been all printed by hand.

• None two butterflies have exactly the same design on their wings.

• “How does the human brain work?” remains one of the most profound questions confront modern Science.

• Kiwi birds search the ground with the bills for insects, worms, and snails to eat.

• Since it lives in the desert, the collared lizard depends from insects for water as well as for food.

• Deciduous trees are ones that lose its leaves in the autumn and grow new ones in the spring.

• Every scientist knows that gravity is the force that maintains the earth and the planets in its orbits around the Sun

• Pictures of the surface of the planet Venus was received yesterday from the space probe “Explorer”, which was launched last year.

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

• The government raises money to operate  by tax cigarettes, liquor, gasoline, tires, and telephone calls.

• Some birds can travel at speeds approaching one hundred miles an hour, and a few land animals can so.

• The prices of homes are as high in urban areas that most young people cannot afford to buy them