______ we know, the air quality in the city has improved over the past two years. A. That B. As C. W...
2022-11-29 22:17:14 63次 2016届河北省石家庄市高一上学期期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
______ we know, the air quality in the city has
improved over the past two years.
A.
That B.
As
C. What D. It
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