范文參考：
Certainly, every person has bad habits. Some people may be in the habit of speaking rudely; some tend to be deaf to others’ opinions; some are inclined to delay. However, there is no doubt that allowing to be controlled by bad habits does a great harm to personal development.
It is not too much to say that it is a destructive behavior to allow to be controlled by bad habits while it is constructive to change unwanted habits. If bad habits are allowed to be developed, they will get out of control and become big obstacles to life or career. For example, a delayed-prone person will hardly restrain himself from missing the deadline. Understandably, he will have few chances to be entrusted with important tasks and then will barely be professionally experienced enough to gain promotion. On the contrary, it is beneficial to change unwanted habits and acquire good ones, because good habits can make people more competent and thus widen the door to success.
In summary, bad habits will probably make it impossible for us to achieve our ambitions. Therefore, we should be alert to our bad habits and make persistent efforts to break them.
寫作思路：
開篇指出雖然每個人都有壞習慣，但是放任壞習慣對于個人發(fā)展十分不利。第二段繼續(xù)論證放任壞習慣對生活及事業(yè)的危害以及改正壞習慣的必要性，且舉例說明。結(jié)尾進行總結(jié)，強調(diào)主題。
亮點表達：
1.be in the habit of doing sth. 有做某事的習慣，或習慣做某事
2.be deaf to sth. 對某事充耳不聞
3.be inclined to do sth. 同義于tend to do sth. 有做某事的傾向,也就是習慣做某事
4.there is no doubt that+句子 毫無疑問的是
5.It is not too much to say that+句子 毫不夸張的是
6.destructive 破壞性的;constructive 建設性的
7.restrain sb. from doing sth. 約束某人做某事
8.be alert to sth. 警惕某事
