It is hardly news that people are using the Internet to communicate with others more and more.Some people fear that someday we will no longer feel the need to talk face to face.However，some recent studies suggest that people communicate even more than they used to.Whatever you agree with，it is clear and no doubt that human communication has changed in the 21st century.
    In June 2008，a British psychiatrist，Himanshu Tyagi，warned that communicating on social networking sites could have a negative effect on the generation of people born after 1990.This generation has never known a world without the Internet.They use the Internet to communicate with others so much that they may have trouble forming real relationships.He said， "The Internet is a world where everything moves fast and changes all the time，where relationships are quickly ended at the click of a mouse".
    Another psychologist，Dr.Aric Sigman，warned of the physical effects that come with using social networking sites.He suggests that less interaction （互动）with people face to face could have biological effects on the human body.Without real personal interaction，the body does not react the same way people were meeting face to face.
    Except for these warnings，there are some studies that show the positive sides of social networking sites.The results of one study show that using social networking sites has increased the self-esteem （自尊心） of young adults Another suggests that college students using these sites feel more "connected" with people when they use them.In addition to scientific studies，there are many who feel that the benefits of social networking sites outweigh （超过） the possible negative sides.Many people，especially those who spend a lot of time at home，for various reasons，are able to communicate with many people using these sites.
    Perhaps the key to this new communication style is self-control and common sense.If someone spends all of his time of the Internet，and never actually sees friends face to face，that seems like an unhealthy way to live.But if someone spends time on the Internet，some of which is spent arranging meetings for "real"time together，then it seems almost complementary （互补的），Balance is the key to keeping communication alive and well in the 21st century.

（1）What did Tyagi warn in June 2008？

He warned that communicating on social networking sites could have a negative effect on the generation of people born after 1990.

He warned that communicating on social networking sites could have a negative effect on the generation of people born after 1990.

（2）How did the college students feel when they use the Internet？

They felt more "connected" with people when they use them.

They felt more "connected" with people when they use them.

（3）What may be the key to the new communication style according to the writer？

It is self-control and common sense.

It is self-control and common sense.

（4）Would you like to use the Internet to communicate with others？Why or why no!？

Yes，because I am able to communicate with many people using the Internet.

Yes，because I am able to communicate with many people using the Internet.