Mr.smith collected stamps 8 years ago用过去进行时改写

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Mr.smithcollectedstamps8yearsago用过去进行时改写Mr.smithcollectedstamps8yearsago用过去进行时改写Mr.smithcollectedsta

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