three metres tall and are as big as the size of a classroom.

　　They are quite different from the houses we live in. They have lots of holes in the wall. Inside there are many wooden shelves.

　　After picking the grapes, people put them on the shelves. Because of the hot weather, hot dry wind gets through the holes in the wall and dries the grapes up. 30 to 45 days later, the fruit will turn into soft, sweet raisins!

　　In around the year 535, people in Xinjiang started to send raisins as presents to the emperor(皇帝). This means that 1,500 years ago people began to know how to make raisins!

36. This passage is mainly about _____________.

　A. how to grow grapes B. how to make raisins

　C. how to build blockhouses D. how to pick grapes

37. Where do people build "blockhouses" in Xinjiang?

A. In the classroom. B. In the grape garden.

C. On the hillside. D. On wooden shelves.

38. What does the underlined word hole mean in Chinese according to the passage?

A. 树桩 B. 枝条 C. 架子 D. 洞孔

39. Why are the "blockhouses" different from the houses we live in?

A. Because they have lots of holes in the wall.

B. Because they aren't as big as the houses we live in.

C. Because there aren't any windows in them.

D. Because there're lots of grapes growing in them.

40. Which of the followings is Not true?

A. People can find raisins in some ice cream, chocolate and cookies.

B. People only dry the full and juicy grapes in the sun to get the raisins.

C. The grapes need 30-45 days to turn into raisins in the blockhouses.

D. People in Xinjiang began to know how to make raisins 1,500 years ago.

　　Are you looking for something fun and would you like to help others in your free time? Then join us to be a volunteer(志愿者)! We're a non-profit (非营利的) organization(组织). We have volunteer jobs of all ages. Anyone, from twelve-year-old children to people about seventy years old 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 Domingo, 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? What