下课铃响了，是值日生留在教室里，不是值日的都出去玩了。
The bell rang after class. The students on duty stayed in the classroom. Not all the students on duty went out to play.
值日生有的是扫地的、有的是擦桌子的、有的是擦黑板的。小红挥动扫帚认认真真的扫地。小兰仔仔细细一张一张的擦桌子。小明拿起一块抹布站到黑板前，觉得够不着黑板上边，他眼睛一转，看见了旁边有一个凳子，他站在凳子上就够着了，他真是个聪明的孩子。他们干得热火朝天。
Some of the students on duty sweep the floor, some clean the table, some clean the blackboard. Xiaohong waves the broom to sweep the floor conscientiously. Xiao Lan is cleaning the table one by one. Xiao Ming picked up a rag and stood in front of the blackboard. He felt that he could not reach the blackboard. He turned his eyes and saw a stool beside him. He could reach it when standing on the stool. He was such a smart boy. They are doing a lot of work.