- 问题详情: AfterGrandmalostthebook,bothsheandtheassistantwereworried.Onedaytheassistantthoughtofanidea.SheaskedGrandmatoputabookmarkineachoftheborrowedbookswiththewords,“Ifyoufindthisbook,pleasegiveitbacktotheschoollibrary.Youwillgetanicepresentf...
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