Usually there might be a lot of accidents in the heavy fog. I happened to witness _______ this morni...
2022-06-18 12:16:07 47次 2020届天津市高三上学期第一次检测英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Usually there might be a lot of accidents in the heavy fog. I happened to witness _______ this morning.
A. it B. those
C. one D. that
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