A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 　31　 in Hong Kong, these trees were cut down and burnt. Now there is　32　 forest left, though there are still some small areas covered with trees. We call these woods.
　　Elephants, tigers and many　33　 animals were living in the thick forest. When people came to live in Hong Kong, the　34　 began to die out. Early farmers grew rice and　35　 pigs and chickens in the valleys. They cut down the trees and burnt them. They needed　36　 to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. 　37　 did most of the wolves and tigers. Monkeys and many other animals soon　38　 in the same way.
　　You might think that there are no longer any animals in Hong Kong　39　 in the zoos. But there are still about 36 different animals　40　 there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals　41　 a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet　42　. They make a noise rather like a dog　43　. In Hong Kong the barking deer has only a real enemy--　44　. People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important　45　 people to protect wild animals.