MissCooperwasateacherworksataschoolforboysandgirls.She...
问题详情： MissCooperwasateacherworksataschoolforboysandgirls.Shetaughtthechemistryforallthestudentsfromdifferentgradeintheschool.Sometimesthenewclasseslearnedrapidly,butsometimestheywereslowly.Oneday,...