（1） C C Mr.Brown has a heart problem.One day，he suddenly fell down on the ground.He almost stopped breathing. （2） D D Ann lives in an apartment on the 20th floor and there are three lifts in the building.Ann's next room had a fire accident last Monday. （3） B B My grandfather is 80 years old and he likes walking alone.But he fell downstairs one day while he was going out. （4） E E Mary has a pet cat and she loves to play with it.One day the cat bit Mary's fingers suddenly but they didn't bleed. （5） G G John is very healthy and he often does exercise to keep fit.One thing that John worries a lot is that his nose often bleeds in hot summer while he is playing sports.

A.Burning Accident     If you are burnt （hurt by fire or something very hot），cool the burnt part at once.Run cool （not cold） water over the burn until it is less painful.Put a piece of dry clean cloth over the burnt part. B.Falling Downstairs     If someone around you falls downstairs，first you should make sure if he can move.Then call the doctor if it's serious. C.Stopped Breathing     If someone has stopped breathing，you must try to start his breathing at once.It's best to use the mouth-to-mouth way.Lay the person on his back and blow air into his mouth. D.Fire Accident     If there is a fire，never use a lift in the building，because it's very dangerous.The lift may get trapped between floors.     Use the stairs and leave the building at once. E.Bitten by an Animal     If you are bitten by an animal，wash the cut under cool running water.Cover the broken part，if there is any，with a piece of clean cloth.Then see a doctor as soon as possible. F.Cut by a Knife     If you are cut by a knife，you should put some medicine on the cut and cover it with a bandage.If it's a deep cut，you should see a doctor at once. G.Nosebleed     If you have a nosebleed，you must try to stop the bleeding.     Put your head down，press the sides of the nose and clean your face.