1. They have clean the classroom .
   他们把教室打扫过了。
2. I take a seat in the back of the classroom.
   我坐在教室后排座位
3. He entered the classroom.
   他进了教室。
4. The teacher herded the children into the classroom.
   老师将孩子们领进教室。
5. Please count the desks in this classroom.
   请把这个教室里的桌子数一数。

　1个名词解释