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Fire can help people in many ________. But it can also be dangerous. Fire can keep your house ________, give light and cook food. But fire can burn things too.

________ knows how people began to use fire. But there are many interesting old stories about how a man or a woman ________ a fire. One is about a man. The man lived a very long time ago. He went up to the sun and ________ fire down.

Today people know how to ________ a fire with matches(火柴). Children sometimes like to play with them. But matches can be very ________. One match can burn a piece of paper, and it could burn a house. A small fire can ________ into a big fire very quickly. So you ________ be careful not to play with fire.

If you are careful, fire will help you a lot. But if you are not careful enough, it may ________ you.