选词填空。

    One day a snail(蜗牛)is ill. Xiyangyang goes into the snail's body to help him. But Huitailang ____ this. He ____ goes into the body of the he snail to catch Xiyangyang. Then Xiyangyang sides ____ white germs(细菌), and Huitailang sides with black germs. A big fight happens ____ white germs and black germs. Later, they know the worst(最坏的)one is yellow germs, ____ white germs and black germs both fight against yellow germs. In the end, yellow germs are moved(被感化). They ____ good with white germs and black germs, and the snail is also ____. The story tells ____ peace is very important. In the peaceful world, everyone is Nappy.