这几天,丁奇发现一件奇怪的事:每天早晨上学时,楼梯总是一尘不染,像是被人仔细扫过一样。楼梯一直是护院的李大爷在扫,可是李大爷已经生病十几天了,是谁在做好事呢?老师常要求同学们做好事,而且还要把做好事的经过写成作文。可妈妈一听说丁奇想做好事———帮李大爷扫楼梯,就一 These days, Ding Qi found a strange thing: every morning go to school, the stairs are always spotless, like being carefully swept the same. Uncle Lee has been nursing the stairs in the sweep, but Uncle Lee has been sick for ten days, and who is doing good things? Teachers often require students to do a good deed, but also to write a good thing after writing. Mom can hear Ding Ding want to do good thing - to help Uncle Li sweep the stairs, one