范文參考：

　　Certainly, every person has bad habits. Somepeople may be in the habit of speaking rudely; sometend to be deaf to others' opinions; some areinclined to delay. However, there is no doubt thatallowing to be controlled by bad habits does a greatharm to personal development.

　　It is not too much to say that it is a destructivebehavior to allow to be controlled by bad habits while it is constructive to change unwantedhabits. If bad habits are allowed to be developed, they will get out of control and become bigobstacles to life or career. For example, a delayed-prone person will hardly restrain himselffrom missing the deadline. Understandably, he will have few chances to be entrusted withimportant 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, becausegood 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 ourambitions. Therefore, we should be alert to our bad habits and make persistent efforts tobreak them.

　　寫作思路：

　　開篇指出雖然每個(gè)人都有壞習(xí)慣，但是放任壞習(xí)慣對(duì)于個(gè)人發(fā)展十分不利。第二段繼續(xù)論證放任壞習(xí)慣對(duì)生活及事業(yè)的危害以及改正壞習(xí)慣的必要性，且舉例說明。結(jié)尾進(jìn)行總結(jié)，強(qiáng)調(diào)主題。

　　亮點(diǎn)表達(dá)：

　　1.be in the habit of doing sth. 有做某事的習(xí)慣，或習(xí)慣做某事

　　2.be deaf to sth. 對(duì)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(xí)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(shè)性的

　　7.restrain sb. from doing sth. 約束某人做某事

　　8.be alert to sth. 警惕某事