Thestudentsarecleaningtheclassroom.Theyarebusy.(合并成一句）
2021-06-18 71次 反馈错误 加入收藏 正确率 : 100%
题目内容：
The students are cleaning the classroom.They are busy.(合并成一句）
优质解答
The student are very busy because they are cleanig the classroom请采纳 - 追问：
- The students are _____ ______the classroom.
- 追答：
- busy of
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