题目内容：

BEC 中级 的作文 我写的怎么样,
Dear All,
The reason why i whrite this letter is that I have just been informed that our company's computer system will be closed down,at 5 PM wednesday,to make an improvement .and because we will lose all the files in disk C after the improvement,we have to move all the files that is usefull to other disk.
After the improvement will could get a faster speed when using the internet,then we will work more effciently.
Best regards
Derek