完形填空Thousands of yeas ago,people did not know(1)to make a fi

完形填空
Thousands of yeas ago,people did not know(1)to make a fire.When it was very(3)at night,they could not sleep well.Sometimes lightning hit a(2) and started a fire.At first people were both surprised and (4)to see the fire.They were afraid to go up.Later a few(5)men took some of this fire and made a fire near their homes.They used the fire to keep them warm ang to cook food.
When they had a fire,they did not let(6)burning.If it stopped,they could not start it again.Maybe they had to(7)for a long time,sometimes for(8).Later they(9)how to make a fire with pieces of wood.
Now we have matches,we can put them in our pockets and make a fire when we want to make it.But we have to be(10)with fire
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