午餐 / 结束 / 后 / 值日生 / 负责 / 擦桌 / 并 / 把 / 椅子 / 摆 / 整齐

午餐结束后，值日生负责擦桌，并把椅子摆整齐。

After lunch, the students on duty are responsible for wiping the tables and arranging the chairs neatly.