When Mr. Li came in and saw the clean and tidy classroom, he was very satisfied and praised the stud...
2022-09-02 11:10:34 76次 福建省2019-2020学年中考成果检测卷（一）英语试卷（含听力） 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
When Mr. Li came in and saw the clean and tidy classroom, he was very satisfied and praised the students who were______________.
A.on time B.on business C.on duty
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