阅读下面的短文，并完成短文后的任务。
Each country has many kind people who volunteer to take care of others．For example （4）some high school and university students in the United States often spend many hours as volunteers in hospitals or old people’s homes． They read books to the people there, or they just visit them and play games with them or listen to their problems．
Other young volunteers go and work in the homes of people who are sick．They clean up or do the shopping．For boys who don't have fathers there is an organization called Big Brothers．University students and other people take these boys to baseball games and help them to get to know things that boys usually learn from their fathers．
Each city has a lot of clubs where boys and girls can go to play games or take part in other activities．Some of these clubs show movies or have short trips to the mountains, the beaches or museums．Most of these clubs use a lot of high school and university students as volunteers because they are young enough to remember the problems of younger boys and girls．
（5）Volunteers believe that some of the happiest people in the world are those who help to bring happiness to others．
任务l：根据短文内容回答下列问题。
1．What’s Big Brothers?
2．Why do most of the clubs for boys and girls use young students as volunteers?
3．Which can be the best title for the passage?
A．Clubs in the USA B．Students in the USA
C．Big Brothers in the USA D．Volunteer work in the USA
任务2：将文中划线的句子翻译成汉语。
4．______________________________________________________________________
5．______________________________________________________________________