MissCooperwasateacherworksataschoolforboysandgirls.She...
問題詳情： MissCooperwasateacherworksataschoolforboysandgirls.Shetaughtthechemistryforallthestudentsfromdifferentgradeintheschool.Sometimesthenewclasseslearnedrapidly,butsometimestheywereslowly.Oneday,...