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Windows are made of glass.
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Hydrogen is lighter than the atmosphere.
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Why are you always in good mood?
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Do you study the information technology at school.
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The Internet is an important source of the information.
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A lot of people find maths very difficult.
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I need new mouse for a computer.
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Water always flows downhill
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Only 11 climbers have climbed all mountains in the world over 8,000 meters high.
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Many people are interested in nature and environment.
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Half of computers of our school don't work.
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Photoshop is program for editing digital images.
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Global warming is causing a rise in temperature.
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The scientists have discovered the new galaxy.
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I lost all my work when computer crashed.
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Electricity is an essential part of our modern way of life.
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