The air quality in the city, ________ is shown in the report, has improved over the past two months....
2022-09-13 02:44:15 66次 甘肃省张掖市2018-2019学年高二上学期期末联考英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The air quality in the city, ________ is shown in the report, has improved over the past two months.
A. it B. that
C. which D. as
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