听力原文：M: I just came back from a trip to China and I was very impressed with the long h

W: Last year I visited Europe. It was interesting to see the ancient ruins there, too.

M: When I look at our country's history, I begin to sense what a young country the States really is.

W: Yes. There are many countries whose histories were ancient when ours was just beginning.

M: The first English settlers arrived in America about the time the last Chinese dynasty began.

W: I believe one reason America has been able to be so successful in so many aspects is that it had no ancient traditions to bind it down.

M: Why would you say that？ The settlers to America came from countries all over the world and must have brought their traditions with them.

W: Yes, they did and those traditions have enriched the American heritage; however, their purpose in coming to this new country was so they could make a change from the way they were living. Most immigrants to America were penniless. They came here to take advantage of a new way of life.

M: Sometimes I think we ignore the history of the native people encountered here in the Americas, both North and South.

W: Well, that's true. I've noticed, however, that the remains of civilizations in North America don't appear to be as ancient as those found in Mexico or Central and South America.

M: Those civilizations must have been as ancient as what I saw in China. They didn't have an influence on the modern countries, though. Why is that？

W: It's because those were dead civilizations. For some reasons, the traditions from those civilizations did not carry on to the surviving natives of the land.

M: Do you think that's the reason, or is it that the immigrants who exerted authority over the natives were able to suppress their traditions？

W: I would think both are explanations.

(20)

A．Chinese ancient history.

B．European history.

C．American native civilization.

D．American history.