After school, the students lined up to go home. Xiaoqing, Xiaoming and Xiaohong stay on duty. Xiaoqing cleans the table, Xiaoming cleans the floor and Xiaohong cleans the blackboard. They do their own duty. Everyone cleans very carefully. They finish it in a short time.
放学后，学生们排队回家。小青、小明、小红继续值班。小青擦桌子，小明擦地板，小红擦黑板。他们各司其职。每个人都很小心地打扫。他们很快就完成了。
They looked at the black blackboard, the neat desks and chairs, the clean classroom and smiled happily.
他们看着黑色的黑板，整齐的桌椅，干净的教室，开心地笑了。
