帮我改改这段短文的错误.
有错的话就指出,没有的话就说全对.
LastSunday,MrLitookourclasstonuringhometovisittheolds.Becausewehave50students,Sowedividedusintofourgroups.
Inthenuringhome,accordingourplan,fivestudentsplayedchesswiththeoldpeople.tenstudentstalkedtothen.15studentswashedtheoldpeople'sclothes.Theotherstudentsweretohelpingcleanthenuringhome.Atlast,weweresinginganddancing.Weallhaveawonderfulday