The main content of this course is writing the letters for business communication.The way I studied

题目

The main content of this course is writing the letters for business communication.The way I studied on this course is that the experience,opinions and the method of learning are very important.
xxx is skills classes of international trade specialty.

答案

文中writing letters改为 the letter writing,
business 前面加定冠词 the
The way I studied on this course.改为
What I'm studied in the course is focus on the learn of the experiences,opinions,and the methods ,which are very important.
最后一句可改为 xxx is a class for the skill of the international trade specialty