下課鈴響了，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.

值日生有的是掃地的、有的是擦桌子的、有的是擦黑板的。小紅揮動掃帚認認真真的掃地。小蘭仔仔細細一張一張的擦桌子。小明拿起一塊抹布站到黑板前，覺得夠不著黑板上邊，他眼睛一轉(zhuǎn)，看見了旁邊有一個凳子，他站在凳子上就夠著了，他真是個聰明的孩子。他們干得熱火朝天。

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.