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  3. Overhead bridges are found in many parts of Beijing, especially in places where traffic is very heavy and crossing the road is d

Overhead bridges are found in many parts of Beijing, especially in places where traffic is very heavy and crossing the road is d

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问题     Overhead bridges are found in many parts of Beijing, especially in places where traffic is very heavy and crossing the road is dangerous.
    The purpose of these bridges is to enable pedestrians to cross roads safely. Overhead bridges are used in very much the same way as zebra crossings. They are more efficient although less convenient because people have to climb up a long flight of steps. This is inconvenient especially to older people. When pedestrians use an overhead bridge, they do not hold up traffic. However, when they cross a busy road usinga zebra crossing, traffic is held up. This is why the government has built many overhead bridges to help pedestrians and to keep traffic moving at the same time.
    The government ofBeijing has spent a large amount of money on building these bridges. For their own safety, pedestrians should be encouraged to use them instead of risking their lives by dashing across the road. Old people, however, may find it a little difficult climbing up and down the steps, but it is still much safer than walking across the road with all the danger of moving traffic.
    Overhead bridges serve a very useful purpose. Pedestrians, both old and young, should make it a habit to use them. This will prevent unnecessary accidents and loss of life.
The underlined part "a zebra crossing" probably means______
选项 A、a safe place across a road forolder people to rest in
B、a wild animal fromAfrica that looks like a horse with broad dark brown and white stripes on its body
C、a safe place across a road for zebras to walk across the road
D、a safe place across a road for pedestrians to walk across the road
答案D
解析 从文章第二段“when pedestrians．．．they cross a busy road using a zebra crossing…”可知划线部分指的是供行人安全通过的区域。故D为正确答案。
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