There are some animals living in a big house. They are Mr. Pig, Mr. Frog(青蛙), Miss Bird, Miss Snake(蛇) and Miss Bear. They are good friends. They play together. In spring, Miss Bird is very happy. Because spring is her favourite season. She can sing and dance all day. In summer, Mr. Frog is happy. Because he can swim in the river. But Mr. Pig doesn't like summer because it's too hot. In autumn, Mr. Pig is very happy, because it's windy and cool. He can eat a lot of food. In winter, Miss Snake and Miss Bear are happy. Because they can sleep for a long time.