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- 好啦,孩子们,咱们现在打扫房间吧。
Okay children, we'll clear up the room now.
- 当他正在打扫房间的时候,他在角落里发现了一块手表。
He is cleaning the room when he finds a watch in the corner.
- 我们不是正在打扫房间。
We are not cleaning the room.
- 他昨天没打扫房间。
He didn't clean the room yesterday.
- 他昨天打扫房间吗?
Did he clean the room yesterday?
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