This is a simple idea, but that is hard to put into practice. A. one B. it C. that D. those
2022-11-06 17:43:00 25次 2014-2015学年湖南怀化中小学课程改革教育质量监测高三上期中英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
This is a simple idea, but that is hard to put into practice.
A. one B. it C. that D. those
本题链接：
