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Fire can help people in many ways. But it can be very dangerous. Fire can heat water, warm houses, give light and cook. But fire can burn things, too. It can bum trees, houses, animals or people. Sometimes big fires can bum forests.
Nobody knows for sure how people began to use fire. But there are many interesting stories about the first time a man or a woman started a fire. One story from Australia tells about a man very, very long time ago. He went up to the sun by a rope (绳子) and brought fire down.
Today people know how to make a fire with matches (火柴). Children sometimes like to play with them. But matches can be very dangerous. One match can burn a piece of paper and then it might burn a house. A small fire can become a big fire very fast. Fire kills many people every year. So you must be careful with matches. You should also learn to put out fires. Fires need oxygen(氧气). Without oxygen they will die. Cover a fire with water, sand, or sometimes with your coat. This keeps the air away from a fire and kills it. Be careful with fire, and it will help you. Be careless with fire, and it will burn you.
1
How did people begin to use fire?
A.Not everybody knows how people began to use fire.
B.Nobody knows how to make a fire.
C.It is an Australian who started a fire.
D.We are not sure how people began to use fire.
本题答案:
  • A
  • B
  • C
  • D
  • 参考答案:D
  • 系统解析:
    事实细节题。文章第二段第一句提到没有人确切知道人类是怎样开始利用火的,所以选 D。
2
Children mustn't play with matches because _____ .
A.matches bum paper
B.it isn't interesting
C.they can be dangerous
D.they can burn a house
本题答案:
  • A
  • B
  • C
  • D
  • 参考答案:C
  • 系统解析:
    事实细节题。见文章第三段第二句。不能让孩子们玩火是因为太危险。D 选项(可能烧掉房子)只是玩火可能出现的一种结果,不全面。
3
When you are going to put out a fire, you _____ .
A.must be careful
B.should keep air away from it
C.must know it is dangerous
D.should cover it with water
本题答案:
  • A
  • B
  • C
  • D
  • 参考答案:B
  • 系统解析:
    事实细节题。根据文章第三段的第九、十、十一句,氧气是助燃的,灭火要隔绝空气中的氧气,所以选 B。
4
We must be careful with fire, or it _____ .
A.will die
B.will warm our houses
C.might bum us
D.won't help us
本题答案:
  • A
  • B
  • C
  • D
  • 参考答案:C
  • 系统解析:
    事实细节题。见文章第三段前几句话。我们用火时要小心,稍有不慎就有可能烧掉一切。A 表示“否则它就熄灭了”。
5
Which of the following is the main idea of this passage?
A.Fire can help people in many ways.
B.Fire can be both helpful and dangerous.
C.Fire can burn things and people.
D.We must be careful with matches.
本题答案:
  • A
  • B
  • C
  • D
  • 参考答案:B
  • 系统解析:
    归纳概括题。第一段总说火的两面性:既可帮助人类,也是很危险的。接下来分说火的用处和危险性,所以选 B。
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