- 问题详情:WorldBookDayisacelebrationofallthingswonderfulaboutbooksforallages,withauthorevents,schoolfancy-dressparadesanda£1booktoken(购书券)giventoallschoolchildrenunder18.Itisayearlyeventon23rdApril,organizedbytheUnitedNationsEducational,ScientificandCu...
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