假如你是某中学的一名学生。6月3日，是星期五，在放学回家的公交车上，你所经历的一件事让你印象深刻。请你根据以下要点用英语写一篇日记。
要点：
1. 一位老爷爷和十来岁的孙子上了车，老人拿着书包和小提琴；
2. 你给老人让座，老人的孙子却坐了下来，老人只得站在旁边；
3. 孩子大声喊着向老人要水喝，并将空水瓶扔到车上；
4. 你认为孩子应该尊敬、照顾老人，保持环境卫生。
参考词汇：孙子grandson  空水瓶empty bottle   保持……干净keep…clean
要求：1. 词数：80~100个。
2. 日记开头已给出，不计入总词数。
3. 要点齐全，行文连贯，可适当发挥。
June 3, Friday                         Fine
On my way home on the bus, I saw                                               

【参考范文】

June 3, Friday       Fine

     On my way home on the bus, I saw an old man get on with his grandson of about ten. He was carrying the boy’s schoolbag and violin. I gave my seat to the old man at once. However, the boy sat down first. The old man had to stand nearby. After a while, the boy shouted to his grandpa for water and then dropped the empty bottle on the bus.

     When I saw this, I got very angry. I think the boy should not only respect and take care of the old man but also keep the environment clean.