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A man saw YU Gong and his family when they (were working on)moving the mountains.括号内是什么时态

分类: 作业答案 • 2021-12-28 15:12:30

问题描述：

A man saw YU Gong and his family when they (were working on)moving the mountains.括号内是什么时态

答

过去进行时