Nowadays we are required to do research work apart form the lessons we learn in school．

We are very interested in this kind of activity．We have a variety of subjects to choose from,

such as local customs, changes of people's living conditions and protection of the environment．

     Last term our group made a study of the pollution in a river in my hometown.The river used

to be clean,but now it is dirty and the water gives off a terrible smell.Our research shows that

the liver is mainly polluted by the waste water from the factories.Waste water from pelple's daily

life and agricultural chemicals also lead to the pollution of the river.To deal with the problem,we

call for people to be aware of how serious the satuation is and do something about it .

     Through our research,not only did we gain practical experience,but also we developed various

abilitites.We find Such research very valuable and helpful.

答案不唯一。