阅读短文，根据短文内容及首字母提示，在空白处填入一个适当的单词。
    People and animals live in the same world. We should keep the balance b ____  people and animals. If the balance is destroyed，there will be bad result to both people and animals. Wild animals are f____  of people. We have to p____  them, or there will be no wild animals in the future. Now we know that there are n____ 2,000 nature reserves（自然保护区）in China
    There is a black and white animal l____  in China. It is always known as the national treasure（国宝）of China. Everyone knows it is called Giant panda. Now there are  f____ pandas than before. Most of them live in Sichuan and Gansu Provinces. There are also some other rare animals in China.H____ , the n____ is becoming smaller and smaller than before. So people should try t____  best to help these animals. They are in d____ of disappearing from the world.