There are already students in the classroom
教室───classroom;学生───student
Just as the teacher plays the role of leader in the classroom, so does the headteacher play a leadership role in the school.───在课堂上老师扮演着领导者的角色，同样，在学校里校长也充当着领导者的角色。
The students took turns to clean up their classroom.───学生们轮流打扫教室.
This is our classroom.───这是我们的教室.
The students filed in the classroom.───学生们鱼贯而入教室.
These flowers brightened the classroom.───这些花使教室生辉.
She'd sent him outside the classroom.───她叫他到教室外面去。
She made zealous efforts to clean up the classroom.───她非常热心地努力清扫教室.
The classroom teacher must be sensitive to a child's needs.───课堂教师必须理解孩子的需求。
There are forty people in the classroom.
The pupils trotted to the classroom.
Videos are useful things to have in the classroom.
There are twenty desks in the classroom.
The children put up posters on the classroom walls.