The Great Wall runs across North China like a huge ____ (龙). It winds its way from west to east, across deserts, over ____ (高山), through valleys till at last it reaches the ____ (海). It's the longest wall on the earth, also one of the ____ (奇迹) in the world. The Great Wall has a history of ____ (超过)2,000 years. The first part was built during the Spring and Autumn Period. All the walls were joined up in Qin Dynasty. All tile work ____ (被做) by hand. ____ (成千上万的) people died while building the wall. Thus the Great Wall came into existence. Since then, it has been ____ (重建) and repaired many times. Now the Great Wall, the admiration of the world, has taken on a new ____ (面貌). It ____ (被参观) by large numbers of people from all parts of the country and the world.