Animals are (people) friends. But many wild animals are facing the danger of (die) out, because the environment that they are living in has changed (great).
For example, their living area has become smaller and smaller because of the (develop) of cities and the increasing of population (人口). They have no enough room to live in enough food to eat. At same time, men are trying their best to kill the animals just getting their fur and skin, teeth and meat.
People should realize how serious it is and something should (do) to protect the animals. We should build some reserves, so that animals can live freely. And people should not be allowed to kill the endangered animals.
We should do something to make our world cleaner and (pretty). Fresh air, clean water and green grass are all important for animals. The death of the (endanger) animals will bring a disaster to human beings.
