这是一个贫寒的家庭，母子俩相依为命。母亲每天起早贪黑操持着这个家，刚上中学的儿子也很懂事，从不让母亲为他生活和学习操心。　　一天放学回来，儿子眉头紧锁，闷闷不乐，晚饭也没吃几口。细心的母亲关切地问儿子：“儿子，怎么了？”儿子吞吞吐吐地说：“同学都骑自行车 This is a poor family. Mother and son are dependent on each other. Every morning, her mother held the family behind her, and the son who had just attended secondary school was also very sensible and never allowed the mother to worry about his life and learning. One day after school, his son was frowned and depressed, and he did not eat a few supper. The attentive mother asked her son with concern: ”What happened to my son?“ The son said slyly: ”Classmates are riding bicycles