教室里响起了悦耳的儿歌:“小羊乖乖,把门开开,快点儿开开,我要进来。不开不开不能开,妈妈不回来,谁也不能开……”这首儿歌,同学们都很熟悉,他们有的跟着哼唱起来了,有的不耐烦地嘟哝:“哎呀,学校怎么变成幼儿园啦?”歌声结束,斑马老师神秘地说:“刚才的歌声,引来了一个人,他就站在门外……”“咚咚咚!”老师把教鞭藏在背后,偷偷敲 The classroom sounded sweet songs: “lamb obediently, the door opened, and soon opened, I want to come in. Do not open can not be opened, the mother does not come back, no one can open ... ” This first song , Students are familiar with, some of them followed by humming, and some impatiently muttered: “Oh, how the school into a kindergarten friends? ” Song ended, zebra teacher said mysteriously: “just singing , Attracted a person, he stood outside ... ”“ pound pound! ”The teacher hid behind the pointer, secretly knocking