The students are cleaning the ciassroom.(用often改写句子）
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Thestudentsarecleaningtheciassroom.(用often改写句子）Thestudentsarecleaningtheciassroom.(用often改写句子）Thestu
The students are cleaning the ciassroom.(用often改写句子）
The students are cleaning the ciassroom.(用often改写句子）
The students are cleaning the ciassroom.(用often改写句子）
The students often clean the classroom.