D. Teenagers should only go to their friends for help.

答案:C

解析:推理判断题。本文的中心可以体现作者的态度:家长应更好地理解他们的孩子。

　　In Europe, many people make friends between their countries through town twinning. Town or city twinning means two towns in different countries agree and decide to become "twins" with a sister city relationship.

　　The people find pen friends in the twin town. They exchange newspapers and stamps. The school teachers discuss teaching methods with the teachers in the twin town. Officials visit the twin town for celebrations. Ordinary people travel to the twin town, too, but not very often if it is far away.

　　Sometimes, schools even exchange their classes for two or three weeks!For example, German middle school students study for a while at the school in their twin town in Britain, staying with British families. A few months later, their British friends come to study in Germany.

　　Many British towns are so pleased with the results of the twinning that they set out to find more than one twin town!

　　Tonbridge, a small town in Kent, for example, has twin town in both Germany and France. Richmond near London has relationships with Germany, France and even a town in a Balkan country!

　　Town twinning can help make friends. It helps students improve their language skills, and also helps people to understand the differences between nations.

4. Twin towns develop 　　　.

A. between European countries and China

B. in the English-speaking countries only

C. in the same country

D. between different countries

答案:D

解析:细节理解题。从第一段中的"Town or city twinning means two towns in different countries. . . "可知姊妹城是在不同的国家之间开展的。

5. How many countries are mentioned in the passage?

A. 4. 　　　　B. 5. 　　　　C. 6. 　　　　D. 7.

答案:A

解析:细节理解题。文中提到Germany, Britain, France和a Balkan country。

6. One of the advantages of town twinning is 　　　.

A. to earn more money

B. to set up schools

C. to improve students' language skills

D. to develop industry and agriculture

答案:C