Fire can help people in many ways.  Fire can heat water, (21)____ your house, give light and cook food. But fire can burn things too. Nobody knows (22)____ people began to use fire. One story from Australia tells about a man a very long time ago. He (23)____ the sun by a rope and brought fire down.

Today people know how to (24)____ a fire with matches. Children sometimes like to play with them. But matches can be very (25)____.

Fire kills people every year. So you must be careful (26)____ matches. You should also learn to (27)____ fires. Fires need oxygen（氧氣）. Without oxygen they die. There is (28)____ in the air. Cover a fire with water, sand, or (29)____, 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 (30)____ you.

The fire in the fireworks factory in Changhua set off a series of powerful ________ and killed four people．

1. A.
   explosions
2. B.
   extensions
3. C.
   inspections
4. D.
   impressions

Who ________ fire to the White House?

[　　]

–The house ____ fire and was destroyed.
--Who ____ fire to the house?