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是他把教室打扫干净的。
The classroom was cleaned by him.
youdao
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同学们已经把教室打扫干净了，瞧，多干净啦！
My classmates have already cleaned our classroom, look, how clean it is!
youdao
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你们离开教室前应该把它打扫干净。
You should clean up your classroom before you leave it.
youdao
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你们离开教室前应该把它打扫干净。
You should clean up your classroom before you leave it.
youdao