| The (1)
| The six states | The (2)
| The Qin Dynasty | (3)
| The Western Han Dynasty | Many more sections of the wall extended to Yinshan Mountain and (4)
| Between the Han Dynasty and the Tang Dynasty | All the dynasties built the walls, (5)
| The Tang Dynasty | The Tang Dynasty itself was so (6)
| The Ming Dynasty | • The Ming court, from its first emperor to the last, never (7)
| The Qing Dynasty | The Qing court repaired and extended some sections of the walls (9)
| At present | It's (10)
History
of the Great Wall || The six states | The (2)
purpose
of building the walls was to protect the states. || The Qin Dynasty | (3)
Although
many people believed that it was Emperor Qin Shi Huang who first built the Great Wall, researchers claimed that before Qin's Great Wall, the six states had already built their own walls. || The Western Han Dynasty | Many more sections of the wall extended to Yinshan Mountain and (4)
fifty
per cent of the ancient Silk Road was along the Han's wall. || Between the Han Dynasty and the Tang Dynasty | All the dynasties built the walls, (5)
including
the Northern Wei, Northern Qi and Northern Zhou Dynasties. || The Tang Dynasty | The Tang Dynasty itself was so (6)
peaceful
that there was no need to build the walls. || The Ming Dynasty | • The Ming court, from its first emperor to the last, never (7)
stopped
building walls because the Ming suffered a lot by troubles from minority tribes.• To make the country much safer than before, the Ming court built a great (8) number
of walls and watchtowers. || The Qing Dynasty | The Qing court repaired and extended some sections of the walls (9)
until
the middle of the Qing Dynasty. || At present | It's (10)
necessary
for us to take action to protect the Great Wall. |答案：1. History
2. purpose
3. Although
4. fifty
5. including
6. peaceful
7. stopped
8. number
9. until
10. necessary
2. purpose
3. Although
4. fifty
5. including
6. peaceful
7. stopped
8. number
9. until
10. necessary