class for illiterate

例句：

1. 1. The teacher is giving a class on the history of the United States.
   老师正在给学生们上美国历史的课。
2. 2. She has been in the same class for three years.
   她已经在同一年级待了三年了。
3. 3. He was accepted into the top class at his university.
   他被大学录取到了最好的班级。