The Great Wall of China

[0] The Great Wall of China is (1) of the most famous landmarks in the world. It was built over many centuries to protect the Chinese Empire (2) invasions. Contrary to popular belief, it is not a single continuous wall, (3) a series of walls and fortifications. It stretches (4) thousands of kilometers across mountains and deserts. Millions of tourists visit the Wall (5) year. However, certain sections are (6) danger of collapsing due to natural erosion and human activity. The government has (7) measures to preserve this incredible monument so (8) future generations can enjoy it.