Which of the following is NOT true of the mirrors？
A. They would be made of plastic and coated with aluminium.
B. They could reflect sunlight to a large area on the earth.
C. They would stay in the same position over the earth.
D. They could be launched directly into space.
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The reflected light would sweep slowly along the surface of the earth because the mirrors
A. would be operated by solar-powered engines
B. could be made to adjust their angles
C. could move around the earth at the same speed as the earth turns on its axis
D. would orbit thousands of miles high to catch the sun's light
Although the fire death rate has declined, the United States______.
A. still has the worst fire death rate in the world
B. is still alert to the fire problem
C. is still training a large number of safety experts
D. is still confronted with the serious fire problem
According to the passage, around the Year 1900 most women married______.
A. at about twenty-five
B. in their early fifties
C. as soon as possible after they were fifteen
D. at any age from fifteen to forty-five
People enjoy listening to music, ______.
A. though they are receiving a lot of decibels of sound
B. because it does not have any negative effect
C. because they don't have to tolerate the noise around that
D. although it is sometimes unpleasant to hear strange sounds
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