Animal school is over. Today is hippo on duty. He will clean the whole classroom, sprinkle water, sweep the floor and clean the blackboard.
He was a little fat, afraid to do so much work will be tired, so he began to lazy.
He deliberately overturned the bucket, the classroom is full of water, he thought so that we can not sweep the floor. He hides some rubbish so that he doesn't take it out. Then he went home early.
All this was seen by the little monkey outside the window. After the hippo left, the little monkey took the initiative to clean the classroom.
The next day, the elephant teacher thought the classroom was very clean, so he praised the hippo. The teacher thought it was the hippo who cleaned it. Hippo blushed in front of the class, and he felt very ashamed.
Hippo finally told the elephant teacher the truth, he asked to stay and clean again, the teacher and other small animals also forgive him.
The little monkey was also very happy. He told other animals to help Hippo clean the classroom.
Finally, the animals study in a clean and bright classroom.