Dear Mr. …,
I'm very sorry for not using the course material frequently. But actually I attach great importance to your subject.
I come to your lecture every week, and listen to you very carefully in class. I have also finished all Linux exercises related to the subject in the lab.
However, I have spent too much time writing assessment report of other courses recently. As I'm an overseas student who is not good at English, it's really difficult for me to finish a report in more than one thousand words. This is why I have not used the online system for your subject for quite a long time.
Maybe there is something wrong with my learning method, but I will find a way to improve my study.
Please understand me and I will work harder on your subject.
别紧张,教授就是让你向他说明没登学科网站的原因,没到警告这么严重.
稍微调整了一下段落的结构,然后纠正了一些小错误.
放心,教授会原谅你的.加油吧!
