题目内容
阅读理解。阅读下列短文，从每题所给的选项中，选出最佳答案。
Stereo sets with headphones started appearing in1979．The headphones were on the ears of walkers, bicycle riders and drivers. By the end of1982, more than10 million people around the world owner the tiny machines.
The owner of Sony, a Japanese company, invented the set. He wanted to be able to listen to music while playing tennis. Many companies now produce models. Some sets play cassette tapes, others play Am or Fm radio. A few even combine all three. The sets allow people to listen to their favourite music at its loudest without troubling anyone else.
As the sets grew more popular, some people began to worry about their use. One worry is about the danger of an accident on the street. A person wearing headphones can't always hear the horn of a car or a warning shout. That fact has led some states to take actions. By the end of 1982, nine states had passed laws that the use of headphones was not allowed by drivers. Some towns and cities also wanted to keep the persons walking in the street and bicycle riders from using headphones in the street.
Another worry is that the headphone set could destroy a listener's hearing. Scientists in Japan studied the hearing of 150 high school children who used headphones regularly. They found that eight children had a hearing loss. These eight children listened to headphones six hours a day. But when they stopped using the headphones, their hearing return.
(1)The main reason that10 million people bought the headphones is probably that the sets ________.
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A．meet the need of people
B．can be used almost anywhere
C．keep out noises
D．play cassette tapes
(2)In some states, it is against the law to wear headphones while ________.
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(3)Headphones would probably be accepted in a library, because ________.
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A．no one else could hear the music
B．there are too many people in the libraries
C．the headphones are small
D．students use the libraries
(4)The passage gives us the impression (印象) that headphones ________.
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A．always cause a hearing loss
B．are hard to use
C．should be used very carefully
D．should be used in proper cases
(5)The scientists found that ________ out of150 children who used headphones regularly had their hearing lost.
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