When I walked past the park, I saw some old people ________ Chinese Taiji. A. does B. did C. doing D...
2022-10-21 00:28:15 148次 中考英语语法专题复习-非谓语动词专题 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. does B. did C. doing D. are doing
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