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      Laughter is infectious.When laughter is shared,it unites people together and increases happiness and

understanding.Laughter also has "the domino effect"．For example,it can improve your energy,reduce

pain,and protect you from the damaging effects of stress.In addition,laughter produces healthy physical

changes in the body.Best of all,this priceless medicine is free and easy to use.

      Laughter is a powerful cure for stress,pain,and disagreement.Nothing works faster to bring your mind

and body back into balance than a good laugh.Laughter lightens your burdens,connects you to others,and keeps you concentrated and ready to act.

     With so much power to cure and renew,the ability to laugh easily and frequently is a great way to solve problems,improve your relationships,and support both physical and emotional health.

     More than just a break from sadness,laughter gives you the courage and strength to find new sources of meaning and hope.Even in the most difficult time,a laugh or even simply a smile can go a long way toward making you feel better.And laughter is really infectious-just hearing laughter can make you smile and enjoy

the happiness.

     Shared laughter is one of the most effective tools for keeping relationships fresh and exciting.All

emotional sharing builds strong and lasting relationship connections,but sharing laughter adds joy and

vitality.

     Laughter is your birthright and a natural part of life.Babies begin smiling during the first weeks of life and laugh out loud within months of being born.Even if you did not grow up in a family where laughter was a

common sound,you can learn to  laugh at any stage of life.

1．According to the passage,"the domino effect" refers to ________.

A．the medical value

B．some infectious diseases

C．a series of positive effects

D．some unexpected negative effects

2．What is the biggest advantage of laughter according to the passage?

A．It makes others regard you as humorous and attractive.

B．People of different languages can communicate with it.

C．A person takes it more easily than other kinds of medicine.

D．It costs no money and it is gainable anytime and anyplace.

3．Which of the following statements is TRUE?                    

A．Babies cannot laugh until they grow older.

B．Sharing laughter can't make people happy.

C．Physical changes will not be influenced by laughter.

D．laughter is the fastest way to balance people's mind and body.

4．It can be learned from the passage that ________.

A．a person's laughter can't affect other people

B．laughter can help people gain a positive attitude

C．people can't connect with others without laughter

D．laughter can't make people feel better in difficult time

5．In the author's opinion,________.

A．everyone has the ability and right to laugh

B．there is no way to keep a relationship fresh

C．laughter is a great medicine to cure all diseases

D．laughter only has a good effect on emotional health

6．用30词左右概括文章大意

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