任务型阅读，根据短文内容，回答下列问题。（10分）
The Great Wall of China is one of the greatest wonders of the world. It is about 5500 miles long. The ancient Chinese began to build some walls around 600B.C. Qin Shihuang, the first emperor of China, joined the old walls together. From then on, people regarded the Great Wall as a symbol of the Chinese nation. Every year, many people find great pleasure in visiting the Great Wall But some sections of it are falling down. So people recently began to protect and repair the Great Wall.
【小题1】How long is the Great Wall?
【小题2】When did the ancient Chinese begin to build the walls?
【小题3】Who joined the old walls together?
【小题4】Do many people visit the Great Wall every year?
【小题5】Why did people begin to protect and repair the Great Wall recently?
It is about 5500 miles long.
网友回答
(答案→)It is about 5500 miles long.
解析：中国的长城是最伟大的奇观之一的世界。它长约5500英里。大约公元前600年古代中国开始建立一些城墙。秦始皇,中国的第一个皇帝,将这些城墙连接在一起。从那时起,人们把长城是中华民族的象征。每年,许多人很喜欢在游览长城,但部分它都倒了。所以人们最近开始保护和修复长城。
【小题1】细节理解题，根据文中语句“It is about 5500 miles long.”理解可知。长城有5500米长。
【小题2】细节理解题，根据文中语句“The ancient Chinese began to build some walls around 600B.C.”理解可知。在公元前600年前，就开始建造长城。
【小题3】细节理解题，根据文中语句“Qin Shihuang, the first emperor of China, joined the old walls together.”理解可知。秦始皇将长城连在一起。
【小题4】细节理解题，根据文中语句“Every year, many people find great pleasure in visiting the Great Wall”理解可知。每年都有许多人来参观长城。
【小题5】细节理解题，根据文中语句“But some sections of it are falling down. So people recently began to protect and repair the Great Wall.”理解可知。因为长城的很多地方已经倒塌，所以应该修建。