The boys volunteer three hours ___________ up the park near their school. A. cleaning B. to clean C....
2022-11-14 19:11:15 178次 [中学联盟]安徽省六安市裕安中学2016-2017学年八年级下学期期中考试英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The boys volunteer three hours ___________ up the park near their school.
A. cleaning B. to clean C. cleaned D. with cleaning
本题链接：
