A blocked airway can kill someone in three to four minutes，but it can take more than eight minutes for an ambulance to arrive.So a simple procedure such as opening someone's airway can save their life while they're waiting for emergency medical help.This means you're more likely to give first aid to someone you know than a stranger.
   There are many misconceptions surrounding first aid.Below are the "most popular" ones with details of what you should do.
   Top four first aid misconceptions：
   1.You should put butter or cream on a burn.The only thing you should put on a burn is cold water — keep the butter for cooking.Put the affected area under cold running water for at least ten minutes.
   2.The best way to treat bleeding is to put the wound under a tap.If you put a bleeding wound under a tap，you wash away the body's clotting agents （凝血剂） and make it bleed more.Instead，put pressure on the wound with whatever is available to stop or slow down the flow of blood.As soon as possible call 999.Keep pressure on the wound until help arrives.
   3.Nosebleeds are best treated by putting the head back.If you put the head back during a nosebleed，all the blood goes down the back of the airway.Instead，advise them to tilt （倾斜） their head forwards and ask them to pinch （捏） the end of their nose and breathe through their mouth.
   4.You need lots of training to do first aid.You don't- what you mostly need is common sense.You can learn enough first aid knowledge in a few minutes to save someone's life- whether it's from reading a book，attending a course or watching videos online.
   Remember that anyone can save a life.

（1）The most important point to save an airway blocked person's life is to

A

A

.
A．keep his airway open
B．ensure the ambulance's arriving time
C．keep the surroundings quiet
D．ask for emergency medical help immediately
（2）If a person is burnt，what you should do immediately is

C

C

.
A．put some cream on the burn area
B．heat up some butter for the burn
C．place the burn under cold running water
D．wash the affected area for a long time
（3）If a bleeding wound is put under a tap，what will happen？

D

D

A．It will help the bleeding stop at once.
B．The wound will help produce more clotting agents.
C．It will produce more pressure on the wound.
D．The wound will bleed more and it is hard to stop the bleeding.
（4）Which of the following statements is RIGHT？

B

B

A．When a person's nose bleeds，please put the head back.
B．You can learn first aid quickly in different ways.
C．When a person is burnt，keep pressure on the burn until help arrives.
D．Not everyone can do first aid to save a life.
（5）The passage mainly tells us

B

B

.
A．how to learn first aid by yourself
B．some misunderstandings about first aid
C．the importance of first aid
D．how to help the medical team save a life