There was complete anarchy in the classroom when their usual teacher was away.
任课老师不在时，班上一片混乱。
Everyone would stand up when the teacher entered the classroom.
老师走进教室时大家都会起立。
The children were drilled to leave the classroom quickly when the fire bell rang.
孩子们接受了如何在火警拉响时迅速离开教室的训练。
Imagine what the boys said when they saw a Marionette enter the classroom!
想象一下，当孩子们看到一个木偶走进教室时，他们会说些什么！
The children rabbited together again when the teacher left the classroom.
老师离开教室后孩子们又聚拢在一起。
I felt lost and terrified when I set foot in the classroom.
踏进教室的那一刻，我感到迷茫和恐惧。
When we leave classroom, we should make sure that all the light are off.
当我们离开教室，我们要确保所有的灯都关了。
But it was very strange that my classmates laughed when I appeared in the classroom.
但是非常奇怪的是当我出现在教室的时候我的同学们都在笑。
When she first stepped into the classroom, her beauty stunned us all.
她第一次踏进教室时，我们全都惊艳于她的美貌。
When the teacher came into the classroom, our monitor spoke in a loud voice, "Stand up!"
老师走进教室时，班长大声喊：“起立！”
We were cleaning the classroom when they came in.
他们进来的时候我们在打扫教室。
What happened when the teacher left the classroom?
老师离开教室后发生了什么事？
When passing by the classroom, I saw_him_doing his homework.
经过教室的时候，我看到他正在做作业。
When the bell rang, the children rushed out of the classroom.
铃声一响，孩子们就冲出了教室。
Nobody took note of him when he stole into the classroom.
他偷偷溜进教室时，没有人注意到他。
Please remember the door when you leave the classroom.
离开教室的时候请记住关门。
Don't forget close the Windows when leaving the classroom.
离开教室的时候不要忘记关窗户。
When LiuKai hurried into the classroom, the teacher had already begun his lesson.
当刘凯急匆匆地赶到教室时，老师已经开始上课了。
The classroom was being cleaned when the teacher came in.
老师进来时，教室还正在打扫呢。
When I reached school again I found nobody in the classroom.
当我到达学校我发现没人在教室里。
When I went into the classroom, I saw my classmates already in their places.
当我走进教室时，我发现同学们都坐在自己的座位上。
What were you doing when I came into the classroom?
我进来的时候，你正在干什么？
But when the teacher came into the classroom, she looked at me for a while.
但当老师走进教室的时候，她看了我一会。
When Liu Kai hurried into the classroom, the teacher had already begun lesson.
当刘凯匆忙进入课堂，老师已经开始教训。
They stopped talking when the teacher came into the classroom.
当老师走进教室时，他们就不说话了。
They stopped talking when the teacher came into the classroom.
当老师走进教室时，他们就不说话了。
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