参考答案

Ladies and gentlemen,
    Welcome to China, Now we are on the way to the Great Wall. Well, here is a brief introduction about it. As you know, it is the only man-made object on earth that can be seem from space by the astronauts. The wall, working mainly as a defender, was first built in the Qin Dynasty and added to in the Ming Dynasty. Now it is more than 6000 kilometers long, 6-7 meters high, and 4-5 meters wide. The most unbelievable thing is that all the work was done only by hand without any help of modern building machines. Every year, it attracts and receives thousands of visitors from every part of the world. Therefore, the Great Wall has become a pride of all the Chinese people.