Being trapped in an elevator（电梯） can be one of the worst experiences of one's life． Some people who have such experiences may be afraid to use an elevator again． In fact， there are some useful tips to follow when people are in trouble with the elevator．

    First， take deep breaths and keep calm． Too much fear will add to your panic（恐慌） and make you too nervous to think clearly． Tell yourself to be patient and believe that nothing is impossible．

    Secondly， use the emergency（急救） call inside the elevator or your mobile phone to let people outside know you are stuck in the elevator． There is an emergency call on the wall of each elevator． You may use your mobile phone to give light and find it． The phone number can be found around it．

    Thirdly， putting up messages on Wechat（微信） is also a good idea to allow more people to find you are in need of help． If help hasn't come， knock the door to get attention from other people in the building．

Fourthly， move less and try to relax． Even if the workers have known your situation， it may take them a long time to repair the elevator and bring you back to safety． Instead of keeping moving all the time， you are advised to keep still and relax yourself as much as possible， or you will make yourself tired out． Make sure that you are fine when the door is open．

（1）According to the passage， when in trouble with an elevator， you should　　first．

A． shout out for help

B． do nothing but wait

C． keep calm and think clearly

D． try to break the door open

（2）The underlined word "stuck" in the passage means "　　"．

A． tired

B． kept

C． trapped

D． troubled

（3）People are advised to send messages on Wechat when trapped in an elevator so that　　

A． their situations can be known by more people

B． they can spend their time easily

C． they can become less nervous

D． they can make more friends

（4）If you are trapped in an elevator， you must move less， or　　

A． you may fall asleep

B． you may become very tired

C． you may feel bored

D． you may feel lonely

（5）What's the purpose of the article？　　

A． To introduce how to use an elevator．

B． To tell us an elevator often goes wrong．

C． To warn us not to take an elevator．

D． To teach us how to save ourselves when trapped in an elevator．