Amber Room. However, some of the Nazis secretly stole the room itself. In less than two days 100,000 pieces were put inside twenty-seven wooden boxes. There is no doubt that the boxes were then put on a train for Konigsberg, which was at that time a German city on the Baltic Sea. After that,what happened to the Amber Room remain a mystery.

21. What did Frederick William I get when he sent the Amber Room to Peter the Great?

A. A box of treasure. B. A team of soldiers.

C.A piece of open land. D.A great palace.

25. Who used the Amber Room as a small reception hall?

A. Frederick I B. Frederick William I C. Peter the Great D. Catherine Ⅱ

26. What do we know about the Amber Room?

A. Tons of yellow-brown honey were used to make it.

B. The Amber Room was found at the summer palace.

C. More details were added to the Amber Room by Catherine Ⅱ.

D. 27 wooden boxes inside the room were stolen by the Nazis.

27. What is the text mainly about?

A. The search for the lost Amber Room. B. The history of the Amber Room.

C. The use of the Amber Room. D. The history of Russia.

　　C

　　America is growing older. Fifty years ago, only 4 out of every 100 people in the United States were 65 or older. Today, 10 out of every 100 Americans are over 65. The aging of the population will affect American society (社会) in many ways -education, medicine, and business. Quietly, the aging of America has made us a very different society -one in which people have a quite different idea of what kind of behavior is suitable at various ages.

　　A person's age no longer tells you anything about his/ her social position (职位、地位), marriage or health. There's no longer a particular year in which one goes to school or goes to work or gets married or starts a family. The social clock that kept us on time and told us when to go to school, get a job, or stop working isn't as strong as it used to be. It doesn't surprise us to hear of a 29-year-old university president or a 70-year-old man who has become a father for the first time. Public ideas are changing.

　　Many people say, "I am much younger than my mother or my father was at my age." No one says "Act your age"any more. We've stopped looking with surprise at older people who act in youthful ways.

28. It can be learned from the text that the aging of the population in America ______.

A. has changed people's understanding of age

B. has made people feel younger

C. has changed people's social position

D. has slowed down the country's social development

29. The underlined word 'one' in the first paragraph refers to____.