class for advanced studies

例句：

1. 1. The teacher is givinga class on the history of the UnitedStates.
   老师正在给学生们上美国历史的课。
2. 2. She was in the same class asher best friend.
   她和她最好的朋友在同一个班级。
3. 3. The students are divided into different classesbased on their abilities.
   学生们根据能力被分成不同的班级。