1.  In London he working hard to improve his English, then he began to write some articles and books on politics and social problems.

2.  The spring Festival is not only the beginning of a year but also the social intercourse time.

3.  With the social development, the faster the social pace, the greater the knowledge of society we need, so that we must get to know the world.

4.  Second, we can go out of campus to make any social service for people, by thus , we can get knowledge increasingly.

5.  As a student of university I intend to do some home teaching in my spare time, and to find some social jobs to do on holidays.

6.  There are many ways, for example, social activity, social practice, social service, and so on .

7.  For example, the saying of "practice makes perfect" is also important in learning other subjects, and engaging in social jobs.

8.  Secondly, in old days, some social infrastructures , such as hospital, are not very good because of the living conditions.

9.  Nowdays many social infrustructures develop.

10.  The changing of the health gains in developing countries is because of the developing of social , culture especialy the medicine.