The teacher was absorbed in writing something, only _____ now and then to refer to a book or another...
2023-01-13 10:29:22 140次 2011-2012学年浙江省宁波市高三“十校联考”考试英语试题 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The teacher was absorbed in
writing something, only _____ now and then to refer to a book or another.
A. to stop B.
stopped C.
stopping D. having stopped
本题链接：
