语法填空 “Leave a place better than you found it.” is a simple philosophy that I hold dear. I led 20 volunteers to help clean up the Great Wall in April. Tile Great Wall is one of the 61 (great)structures in the world. Everyone has a responsibility to protect it. I first went to China to visit the Great Wall in 1986. Since 1990, I 62 (stay)in China with my family, 63 (spend) more than 2,700 days on the Great Wall. I have written several books on the subject, and also fronted documentaries. I am credited with arousing China’s 64 (nation) consciousness to protect the Great Wall and its environment and I have held several exhibitions. 65 (protect) the Great Wall and assume the role 66 its international ambassador, I got permanent residency(居住权)in China. I live in a village below the Great Wall. It’s a good thing that people are going out to enjoy 67 (they) and to discover tire great heritage(遗产)and history, but 68 is also quite dangerous if they don’t understand 69__ fragile the environment is. Every person can make a 70 (different). If we can get everybody to protect the environment, the world will be more green, beautiful and healthy.