1.More and more animals are killed by human beings who just for their skin,meat and rare parts for medicine.People catch animals to put them into zoos,which is called'protection',but we all know that the best protection is no human's limit. 2.First,people use different kinds of cages and boxed to hold them up.In the zoos where animals have to live under adults and children's visits and comment. Second,people use law to protect animals,they use law to stop those greedy people from eating our good friends,animals. Third,people build wildlife refuge to help those animals to return their real homes. 3.In one word,people use many interesting ways to help frotecting animals,however,do those ideas really work?The answer is obviously dependent.It depends on how much people keep those zoos in order,depends on how much people are aware of the law and how much do they trully obey.It also depends on what we do to help those wildlife to regain the skills of living in wild.On the other hand,some ideas do work,we can enslow the steps of the extinction of some animals and I felt quite happy when I could see a real nature. 4.Faces with so many problems,I think what we need most is knowing animals are our friends and maybe,the closest friends.Second,only we all try to devote ourselves to animal-protecting can we get sweet reward,that must be,a world where animals and we human beings live together happily.