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  3. 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

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

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问题     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 bum things, too. It can bum trees, houses, animals or people. Sometimes big fires can burn 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 rue with matches (火柴) . Children sometimes like to play with them. But matches can be very dangerous. One match can bum a piece of paper and then it might bum 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 rues. (80)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.  
Children mustn’ t play with matches because ______.
选项 A、matches bum paper
B、it isn’ t interesting
C、they can be dangerous
D、they can bum a house
答案C
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。
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