大一到大四英语怎么说

　　例句：

　　Mr. White teaches first grade in south Georgia.

　　怀特先生在佐治亚州南部教一年级。

　　Why get upset just because you got one bad grade?

　　何必因为一次成绩不好就想不开呢？

　　All the materials used were of the highest grade.

　　使用的材料全是优质品。

　　Hampshire College does not grade the students' work.

　　汉普郡学院不对学生们的作业评分。