There are many kinds of animals in the world. People don't know the exact numbers. In the zoo, people can see many kinds of animals. For example, lions, tigers, they are scary¹. Monkey, foxes are intelligent. People usually think pandas; koala² bears are so cute and smart. Some animals live in the water, such as dolphins. They need a lot of water for their home. And elephants with long nose are very strange. They can sing and dance. The giraffes（长颈鹿） are quite tall because of their long necks. So they can reach the top of the trees.