The final examination will be held at the end of this month. Have you made a good preparation?
这个周末就要期末考试了。你做好准备了吗？

Sure. I've reviewed all the lessons I've learned at this academic year.
当然。我已经复习好这个学期学的所有功课了。

Are you sure you can do well this year?
你肯定你可以在今年的考试中取得好成绩？

I'm a hundred percent certain.
我100%肯定。

According to what you did last time I have my doubts.
根据你上次所说的，我表示怀疑。

I'm sure I can get a 95 this time.
我有把握这次我可以考95分。