1.In my opinion,traveling not only a important sport,with traveling different countries can build up our mind ,France ,we can know about the romanic feelings and learn it, London,we can see the beautiful scene,different kinds of people live in there ,having the life fit for themselves,the most important ,we can learn the culture about the people and the areas.2.etiquette ,including the etiquette about ourselves , the country,the social etc,for example,we travle other countries,the behavior we show ,It explains our quality of our country,It not only show about ourselves but also our country.3. volunteers play a important role in our society,in this 5.12 earthquake,volunteers help the people in Wenchuan and other towns,helping the the local government has taken immediate actions to cope with the sudden disaster,we can see them everywhere,not only in the earthquake,but also other fields,such as the geracomiums,the orphanages.in short words ,When our country or society need them ,they will do it without pay.4.The traffic in large cities is terrible ,It was about four o'clock, the beginning of rush hour.so,the government should build public utilities ,such as the buses ,subway,reduce the personal cars to decrease the air pollution .5.With the development of science and technology ,the society become grower,our life become easier,we can do many things that we can't do many years ago ,such as shopping by the internet but needn't leave the house.but ,the clone has arisen ,many people also want to clone people and do terrible things,if it come true,we will in trouble,maybe there will be the Third World war.