选词填空。
Chinese years are named after _____ animals. They are Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Sheep, Monkey, Rooster, Dog, and Pig. There are many different stories about the ____ of the twelve animals. One of them says: the Jade Emperor held a swimming race to _____ animals for the names of the years. The rat was the ____, and the other eleven animals followed him. So the Jade Emperor named the years in the order they _____the race.