The winter vacation is not so far from us.there are lots of thing I have done while this
vacation.For one thing ,I have my lessons reviewed,in order to improve the qulity of study.
寒假对于我们来说并不长，我需要在这个假期做很多的事。首先，我需要复习已经学过的功课，以此来提高学习质量(Joozone Note:此句也可以翻译为 改进学习方法也可以)。或者整句话可以翻译为：为了提高学习质量，我需要复习功课。

For the other thing,I wish I would be better after hard working with my course.At first, I must correct all my final examination paper. Secondly，I insist on reading English books and newspapers every day.I also keep on oral pratice.
其次，我希望对我努力学习过的这些功课能够有所好转，首先，我需要重新做一遍我的期末考试试卷。接下来，我坚持阅读英语课本并且每天坚持阅读(英文)报纸。同时我还得坚持练习口语。

In my spare time,I will take an active part in activitise.I can gain the first hand imformations through the activitise which can help me to extend my knowlege.
AD:翻译有作文地带提供| 在闲暇的时间里，我将积极参加活动。这样我可以通过活动得到一手信息，已扩张自己的知识面。

I'm sure this vacation will be the best one for me.Let me try!
我确信这个寒假将是我的一个假期。拭目以待吧！