1. 阅读短文，回答问题

What shall we do if we see someone injured in an accident? First aid is the most necessary thing we should give to him.

When we do first aid, we must pay attention to three important things. First we must make sure whether the person is still breathing.  Open his mouth to see if there is any food at the  back of his mouth. Then try our best to start the person's breathing within a few minutes, or he will die.  Try to repeat the mouth­to­mouth way as often as necessary. Finally, if we see a person bleeding badly we must press a handkerchief onto the bleeding point and hold it to stop the bleeding.  For if a person loses one­third of his blood he may die.

First aid is also important in our daily life, for accidents may happen at home.  For example, if a person is bitten by an animal, we must have him wash the wound with cold running water before going to see a doctor. When a person is burnt or cut, we should let him wash the area of his burn or cut under the cold tap and put a piece of dry clean cloth over it. But if it is serious, go to the hospital for medical care. In a word, every one of us should manage to know something about first aid so we could save other people's lives.

1. （1） What should we do if a person is injured in an accident?

   A . We should send for a doctor at once. B . We should call the First Aid Centre. C . We should let him move to see whether he can walk. D . First aid must be given to him immediately.
3. （2） According to Paragraph 2, there are ________ important things for us to do.

   A . two B . three C . as many as possible D . only one
5. （3） What does “the mouth­to­mouth way” mean?

   A . Lay the person on his back, close his nose with your fingers and breathe into his mouth. B . Close the person's mouth and breathe into his nose. C . Lay the person on his back and breathe into his mouth once. D . Let the person sit and try to get him breathe as often as possible.