题目内容：

With rapid 1.(extinct) of many wild species, more and more people come to realize the great significance of wildlife protection.

We have to understand the problem in a new light that we protect ourselves through 2. (protect) wildlife. On the one hand, any species of wildlife helps to establish the ecological balance.If one species becomes extinct, it 3. (disappear) forever. What is more, it will result in the extinction of a chain of wildlife and the destruction of the ecological  balance. Unpredictable disasters  may occur.

On the other hand， 4.the development of modern science and technology, man is just beginning to learn about wildlife.For example, 5. wild rubber trees had been extinct two centuries ago, there would be no auto 6.(industrial) today. Moreover，wildlife preserves unknown genetic codes，which may turn out to be a vital 7. (important) and free human beings from fatal diseases and natural disasters in the future.

It is necessary for us to protect wildlife right now before it is too late, 8. man has already polluted the environment 9. (serious) and threatened the existence of many wild species. Let's take action to protect wildlife. 10.(learn) to live in harmony with all wildlife is part of modern civilization.