【单选题】
Fire can help people in many ways. Fire can heat water， (1)____ your house，
give light and cook fooD、But fire can burn things too. Nobody knows (2)____ people
began to use fire. One story fromAustralia tells about a man a very long time ago. He
(3)____ the sun by a rope and brought fire down.
Today people know how to (4)____ a fire with matches.Children sometimes like to
play with them.But matches can be very (5)____.
Fire kills people every year. So you must be careful (6)____ matches. You should
also learn to (7)____ fires. Fires need oxygen. Without oxygen they die. There is (
8)____ in the air.Cover a fire with water， sand， or (9)____， with your coat or
a blanket. This keeps the air from a fire and kills it.
Be careful with fire， and it will help you.Be careless with fire， and it might
(10)____ you.