- 问题详情:Sallywasastudent.Itwasgoingtobehermother'sbirthday.Shewantedtobuyherapresentthatwouldbeniceandusefulbutnotexpensive.Shewentshoppingafteraquickandsimplelunch.Aftershelookedforhalfanhour,shefoundashopthatwassellingcheapumbrellas,andshedecidedtot...
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