—Let’s go out for a walk. —You’d better not. These days the air is getting much ________ than it was...
2022-12-28 07:59:36 204次 2015年初中毕业升学考试（辽宁丹东卷）英语（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—Let’s go out for a walk.
—You’d better not. These days the air is getting much ________ than it was before.
A. better B. worse C. cleaner D. easier
本题链接：
