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Questions 15-20: Read the passage below then pick out ONE best option (A, B, C or D) to
complete each of the following sentences: (1.5 points)
Scientists are looking for a cheap, clean, effective source of power that doesn't cause pollution
or waste natural resources. Look no further than solar energy from our sun.
At present, most of our power comes from the use of coal and gas, oil or nuclear power. This
power could be provided by the sun, one percent of the solar energy that reaches the earth is
enough to provided electricity for the total population.
Many countries are already using solar energy. Solar panels are placed on the roof of a house
and the Sun's energy can be stored for a number of days, so on cloudy days you can use solar
energy, too.
Sweden has an advanced solar energy program. There, all buildings will be heated by solar
energy and cars will use solar power instead of gas by the year 2015
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