1.Overgrazing land, soil pollutants, and a shift in climate patterns were all the main causes of desertification in Inner Mongolia. _______ 2. The mission of the nonprofit organization Green Life was planting and retaining trees in Inner Mongolia to prevent the desert from advancing. _______ 3. Strong Mongolian winds and the serious shortage of rain led to the failure in their first planting season. _______ 4. Yi Jiefang’s only son’s death in 2000 drove her to great despair. _______ 5. Although she encountered many obstacles and challenges, she never thought of giving up. _______ 6. According to Yi, if a mother holds on, the world can be changed. _______ 7. Having founded Green Life, Yi went back to China to get ready for the first spring tree planting. _______ 8. Yi owed the success in planting to her son’s spirit watching over them. _______ 9. Yi Jiefang’s son, Yang, once mentioned that he wanted to go back to China to plant and retain trees in the desert. _______ 10. Continuing her work, Yi became increasingly concerned about dealing with China’s desertification problem. _______