One possible version：

It is well-known that we are in the world with various difficulties. Faced with them, nothing is more important than hope and self-confidence .With confidence, we can find the problem is not as “huge” as we imagine. Take myself as an example. Once in an exam, it was said that the exam would be difficult, and I was at first a little nervous. When the exam began, I built up my confidence and persuaded myself that I was capable of figuring out all the problems. What was unexpected was that I got the highest scores in the class！

From my experience, I draw a conclusion that we can make it as long as we have confidence in whatever we do.With confidence, we will overcome all the difficulty. Nothing is impossible, brave it out and just do it!

题目分析：本篇书面表达要求谈论面对困难时所需的信心，首先要根据提示信息确定要点，本文要点有三方面，首先讲明信心的重要性、然后举例、最后提出自己的观点。其次在遣词造句上要将有效信息和发挥想象的内容，增添的细节等用灵活的句式表达出来，比如宾语从句、定语从句和各种短语等。 此外还要巧妙地运用一些过渡词或短语来连接成文，使行文连贯、语言流畅。

【亮点说明】本文开篇提出自信的重要性，然后举例说明，最后讲述自己的观点，并且与文章开头相呼应。这种结构安排使文章脉络清晰，结构紧凑，也表现了作者清晰的思路。文中句式较为丰富，比如主语从句It is well-known that we are in the world with various difficulties.状语从句When the exam began,宾语从句we can find the problem is not as “huge” as we imagine同位语从句I draw a conclusion that we can make it as long as we have confidence表语从句What was unexpected was that I got the highest scores in the class！等。此外高级词汇be capable of 和figuring out的出现也是文章的一个亮点。