甘老师是我们班的数学老师。他平日里总绷着一张脸,让人畏惧三分,做事认真麻利,对我们要求严格,又因为他年纪大,所以我们背地里都叫他甘老头。甘老头每天在上课前都会让我们读数学书,好让我们温习上节课的内容,可我们老记不住。这不,我们又犯了老毛病,甘老头阴沉着 Teacher Gan is a math teacher in our class. He always stretched a face on weekdays, making him a third of a third of his fears. He was strict with his work and strict with us. Because of his age, he called him an old man behind the scenes. Old man Gan every day before class will let us read math books, so that we review the contents of the last lesson, but we can not remember. This is not, we are guilty of the old problems, Gan old man gloomy