As is known to all, our school has launched a campaign against bad habits in order to establish a civilized campus. But it has come to my notice that lots of bad behavior still exists in our school. This does great harm to the image of our school.

Therefore, I strongly urge that we students stop throwing rubbish everywhere and spitting in public. Besides, every one must discipline himself not to make dirty remarks or waste food. Such bad manners as smoking and fighting should also be removed from our campus. At the same time, we should also promote the spirit of helping each other and healthy competition. Once again I’m here earnestly calling on everyone to take action and contribute to making our school a nicer place.

That’s all. Thank you.

题目分析：这是一篇发言稿，也是提纲式作文：题目只给了大概的提纲，没有具体的要点，学生要根据所给提纲，列出要点，并以此为基础充分发挥自己的想象力，灵活运用英语知识，采用不同的表达方式将各要点完整地表述出来，注意主次分明，详略得当。语言力求准确、简洁。根据情景的发展，按顺序安排好材料。同时应选用合适的连接词或过渡词，使文章具有一定的连贯性。考生必须认真查验是否有漏写情况，有无拼写错误及标点误用等

【亮点说明】But it has come to my notice that lots of bad behavior still exists in our school. This does great harm to the image of our school.这句话用的是it做形式主语，

I strongly urge that we students stop throwing rubbish everywhere and spitting in public. 这句话用了宾语从句，every one must discipline himself not to make dirty remarks or waste food. 这句话用了不定式，Such bad manners as smoking and fighting should also be removed from our campus. we should also promote the spirit of helping each other and healthy competition.这句话用了动名词， Once again I’m here earnestly calling on everyone to take action and contribute to making our school a nicer place. 这句话用了现在分词做状语，还有文章用了Therefore, Besides, At the same time,这样的关联词，使文章更加连贯。