阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

No discussion about Chinese culture is complete without mentioning of the Great Wall. It is one of the most amazing 【小题1】(structure) in the entire world. Through more than 2,000 years from the 【小题2】(seven) century BC to the 16th century AD, 19 Dynasties built parts of the Great Wall, 【小题3】(add) up to over 100,000 kilometers. It prevented northern people on horseback 【小题4】 attacking people in the south.

The hardships involved in building the Great Wall are beyond 【小题5】(imagine). A Chinese idiom 【小题6】(vivid) expresses the Great Wall, “Efforts joined by many can build the Great Wall.”

Over the centuries, the Great Wall【小题7】(become) a symbol of strength for the Chinese people. For example, the national anthem, composed by Nie Er, 【小题8】(call) on the people to “build our new Great Wall with our flesh and blood.”

The well-preserved sections we see today were mainly built during the Ming Dynasty (1368

—1644), among【小题9】the most popular are around Beijing, including Badaling, Mutianyu, Juyongguan, and Simatai. A day tour or 【小题10】 long hike along the Great Wall allows you to travel back in time to feel the thousands of years’ changes and the ethos (精神风貌) of the ancient Kingdom of China.