When I walked past the park, I saw some old people _________ Chinese Taiji. A. do B. doing C. did D....
2022-09-21 01:46:25 55次 人教版英语九年级Unit6-Unit8阶段过关月考试卷 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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