____ the floor, I found his pen lying on the ground. A. While sweeping B. While swept C. If sweeping...
2022-11-14 02:03:27 168次 2014-2015学年湖南省醴陵市三校高二上期中英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
____ the floor, I found his pen lying on the ground.
A. While sweeping B. While swept
C. If sweeping D. If swept
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