When I walked past the park, I saw some old people _________ Chinese Taiji. A. do B. doing C. did D....
2022-09-12 03:56:36 121次 江苏省南京市2019-2020学年九年级上学期开学考试英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
When I walked past the park, I saw some old people _________ Chinese Taiji.
A. do B. doing C. did D. are doing
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