完形填空（共20小题，每小题1分，满分20分） The Great Wall of China has a history of over two thousand years. It runs from the east to the west in North China. It is about6,300 kilometres .It is often“the Ten-thousand-li Great Wall”. It is one of the “Seven Wonders” of the ancient world. The Great Wall is wide enough for then men to walk . Horses ca run along it. The Great Wall was made of stones and bricks. There are huge stones on side. But now some sections of it are worn out. There are tall watchtowers along the Great Wall. Once upon time, the soldiers kept watching the enemies敌人 in the watchtowers day and night. They made on the towers toeach other when the enemies came. Nowadays we don’t use the Great Wall to keep away the enemies any more. It is a famous place of interest to all the people i .Every yearpeople come to visit it from all over the world.