我有一个“傻”姐姐。每天下午同学们都早早地放学回家了,而她却在检查卫生,直到地面没有一张废纸、窗户关得严严实实才背着书包下楼。每个星期天,同学们都在游乐场玩得兴高采烈。只有“傻”姐姐在教室里,把窗户打开通风、给花浇水。她累得满头大汗,但脸上还是露出一丝微笑。别 I have a “silly” sister. Every afternoon, my classmates came home early after returning home, and she was checking hygienically until there was not a piece of wastepaper on the ground. The window was tightly closed and her schoolbag was downstairs. Every Sunday, the classmates have fun in the playground. Only “stupid” sister in the classroom, open the window ventilation, watering the flowers. She was tired and sweaty, but her face still had a slight smile. do not