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. Without oxygen they die. Since there is 28 in the air, cover a fire with water, sand, or in 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.

21
A.brighten
B.warm
C. beautify
D. lighten
22
A.where
B.when
C. what
D. how
23
A.looked up to
B.put up with
C. went up to
D. came up with
24
A.set
B.make
C. cause
D. catch
25
A.dangerous
B.bright
C. unusual
D.common
26
A.about
B.to
C. On
D. after
27
A.lay out
B.put out
C. put away
D.do away with
28
A.fire
B.danger
C. oxygen
D. atmosphere
29
A.general
B.particular
C. case
D. an emergency
30
A.injure
B.hurt
C. destroy
D. spoil

21 B
22 D
23 D
24 B
25 A
26 A
27 B
28 C
29 D
30 C