高中英语单选
1.Therewasacodeonthecard_____schoolstudentscouldlogontothewebandreceivedoblineeducation.(D)
A.onwhichB.inwhichC.throughwhichD.ofwhich
2.--HaveyougotanynewsaboutJohn,Lily?
--He____inajobinterviewtheotherdayandhe`swaitingfortheresult.(D)
A.wasparticipatingD.participatedand连接不是前后谓语要一致么
3.Itisreallyimportanttoformanatmosphereamongthestudents_where_savingwaterisahabitratherthanarule.为什么填where?