1.Only are they built by the government peope can have a sense of security.
2.Private groups have their own advantages in offering sserices,such as provide high quality of education .
3.Also,indulged in computers can make children eat less or even eat nothing during long time.
4.Another point to be discussed is that,more time spending on computers is harmful to children’s mental health.
5.Why I assert it is necessary for the government to provide education,social security,health care and defence capability because it can ensure all citizens to have access to them.6.Having entered the 21st century ,the world endows us with more chances and confronts us with more challenges.