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- We always keep the classroom clean. 我们总是保持教室清洁。
- Our teacher asks us to keep the classroom clean and tidy. 我们的老师要求我们保持教室的清洁和安静。
- Keeping the classroom clean is our duty. 保持教室清洁是我们的责任.
- Please remind your child to keep the classroom clean and throw trashes into the trash can equipped in the classroom. 请老师及家长提醒小孩不要乱丢纸屑，尤其是上课时间在教室里。
- Keep the classroom clean. 要保持教室清洁。
- The children cooperated with their teachers in keeping the classroom clean. 孩子们和老师一起保持教室整洁。
- keep the classroom clean and sweet 保持教室整洁和空气清新
- They keep the classroom as clean as possible. 他们尽可能的保持教室清洁。
- The students clean the classroom everyday in turn. 学生们每天轮流打扫教室。
- Please keep the watch for me while I go swimming. 我去游泳，请代我保管这表。
- The teacher keeps the students sitting in the classroom. 老师让学生坐在教室里。
- Students are the main body of the classroom teaching,they can keep the initiative in their own hards. 教师既是学生活动的组织者和参与者，也是学生的引导者和评判者。
- She made zealous efforts to clean up the classroom. 她非常热心地努力清扫教室。
- For one thing they keep the water clean. 一方面，他们可以保持水的清洁。
- A group of boys dashed out of the classroom. 一群男孩子从教室里冲出来。
- The classroom was turned upside-down. 教室被弄得乱七八糟。
- She tries to keep the students in the classroom, by locking them up in the classroom and running after those who escape. 她尽力把学生关在教室里,把他们锁在教室里或把他们赶进教室。
- Is there a boy in the classroom? 教室里有一位男孩吗？
- Students are the main body of the classroom teaching,they can keep the initiative in their own hards.They can have their own personal experience. 探究式学习中学生是课堂的主体，具有自主性、体验性、团结合作性与竞争性等特点；
- No one may leave the classroom until the bell goes. 铃响以前任何人均不得离开教室。
