阅读理解 We can see many walls in the world. But the Great Wall of China is the biggest of all. The Chinese call it 'The Ten-thousand-li Great Wall'. It is in fact more than 6,000 kilometers long. It is 4-5 meters wide. In most places, five horses or ten men can walk side by side.When you visit the Great Wall, you can't help wondering how the Chinese people were able to build such a great wall thousands of years ago. Without any modern machines, it was really very difficult to build it. They had to do all the work by hand. It took millions of men hundreds of years to build it. The Great Wall has a history of over two thousand years. The kings began to build the first parts of it around two thousand seven hundred years ago. Then Qin Shihuang had all the walls joined up. He thought that could keep the enemy out of the country. Today the Great Wall has become a place of interest. Not only Chinese people but also people from all over the world come to visit it. 1. The Great Wall is the biggest of all walls in __________. A. China B. Europe C. the world D. Asia 2. How long is the Great Wall? A. It's less than six hundred kilometers. B. It's over six million kilometers. C. It's six thousand kilometers. D. It's more than six thousand kilometers. 3. It took __________ men __________ years to build the Great Wall. A. millions; millions B. hundreds of; hundreds of C. millions of; hundreds of D. hundreds of; millions of 4. The Great Wall was built __________. A. by people all over the world B. without any modern machines C. with some other countri es' help D. by all Chinese kings 5. Qin Shihuang thought the Great Wall could __________. A. keep the enemy out of his country B. keep his body in it C. be visited by all the people D. make his country beautiful