高一英语作文模拟题:文明的举止

希望作者可以加强词汇表达多样性，尤其是学术词汇的积累；行文较为流畅，作者文中过渡词使用的不错；错误句子较少，可适当增加一些复杂句的使用；请注意分段。

Uncivilized behavior often can be seen in everyday life. some students always talk aloud in library. some jump in the quene in the students dinning room. What's more some students spit on the floor. Above the behaviors, have some causes resulted in. Firstly, many students are lack of morals, which is the necessary to be improved. Secondly, we all should observe the rules. Thirdly, we should have a sense of becoming a civilized person.