Are you looking for something fun and would you like to help others in your free time? Then join us to be a volunteer! We’re a non-profit organization. We have volunteer jobs of all ages. Anyone, from twelve-year-old children to seventy –year-old people can become a volunteer.

You can help people in many ways. Schools need help with taking care of children while parents are working. Hospitals need volunteers to look after children while their parents are seeing a doctor. Animal lovers can help take care of those dogs and cats without homes. There is something for everyone.

“As a volunteer, I don’t want to get anything. Seeing the children’s happy faces, I’m happy, too.” said Carlos Green, an old woman of 62. “I often played computer games in my free time before. Now I help older people learn how to use computers,” said another volunteer at the age of 18.

If everyone helps out a little, we’ll have a better world to live in. Interested? Call us at 010-800-555-5756 or visit our website: www.activol.com.

小题1:              can be a volunteer.

A．Children

B．Old women

C．Anyone aged 12-70

D．Young people小题2: Carlos Green does volunteer work for           .

A．animals

B．children

C．computers

D．older people小题3:The passage may be from            .

A．a newspaper

B．a story book

C．a picture book

D．a textbook

三种不同耦合方式的放大电路分别为？