作业帮Mr.smith collected stamps 8 years ago用过去进行时改写
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/01 04:12:31
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Mr.smith collected stamps 8 years ago用过去进行时改写
Mr.smith collected stamps 8 years ago用过去进行时改写
Mr.smith collected stamps 8 years ago用过去进行时改写
Mr smith was collecting stamps at the time 8 years ago
Mr Smith was collecting stamps 8 years ago