完形填空(10分)
Do you like to go camping(野营)?Do you know how to start a fire?If you don't know how to start a fire,you 1 your food,and can't sit by the side of a fire,and can't keep yourselves 2 .
Long,long ago people 3 how to start fires.They probably started fires from lightning (闪电).But they had to 4 the lightning fire burning,for there was 5 to start it 6 .
Later people learned how to start fires.They 7 out hitting two pieces of stone(石头) together could make a spark(火光).The spark could set 8 on fire(set…on fire使……燃烧).They could start this kind of fire again if it went out(熄灭).
Then people also learned to make a fire by rubbing(摩擦)two sticks together.They made a hole(洞)on a large stick and put the 9 stick into the hole.And then they turned the stick again and again, 10 a few minutes they started a fire.
About two hundred years 11 ,people began to 12 matches(火柴).One early match looked 13 the match we use today.The match gave people a 14 way to start fires.Today people are 15 finding new ways to start fires.One of the new ways to start a fire is to use an electric fire starter(电子打火器).Now you can 16 matches and electric fire starter at 17 .Of course an electric fire starter is more expensive than 18 , 19 it is useful.
After people learned to make fires,their lives became 20 .
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