1. (2023九上·福州期中)  根据短文内容及所给提示，在文中的空白处填写一个正确的单词。

In 1988, Wang Chengbang retired (退休) from the army. Instead of enjoying a relaxing life, he volunteered to prevent the land  turning into desert by planting trees in Korla, Xinjiang.

It is not easy job. The high temperature in Korla makes it difficult to work. Besides, water is a big problem. As a matter of , Wang Chengbang's work in the first few years failed as few trees survived (存活).

But no matter how hard, Wang Chengbang would not give up. "After trying many different ways, I have learned how to grow young trees in a (good) way," said Wang Chengbang. He has also (find) new ways to save water. With his hard work, more and more trees have survived. So far, more than 1.5 million trees have been planted by (he).

Now, Korla is a model city in [ɪn,vaɪrən'mentl] protection. Wang Chengbang is also successful in fighting cancer. In 2021, he had cancer and doctors told him that he had only six [mʌnθs] to live. However, he continued taking care of his trees. "Working is the best medicine. Planting trees (help) to fight cancer," he often jokes.

T  he is at the age of 86 now, Wang Chengbang is still working.