题目内容
The students were busy doing their homework, only____ once in a while to have a rest.
A. to stop B. stopping C. to have stopped D. having stopped
B
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天天向上一本好卷系列答案小学生10分钟应用题系列答案题目内容
The students were busy doing their homework, only____ once in a while to have a rest.
A. to stop B. stopping C. to have stopped D. having stopped
B
天天向上一本好卷系列答案小学生10分钟应用题系列答案