5、____Imetanoldfriendofmineafterclass.A.whereB.whenC.thatD.which14.He failed so many times that ______ he gave up hopes.A.in the endB.bytheendC.atanendD.ontheend15.Thirteenminershavebeen ______ undergroundafteracoalmineinnorthwestChina'sGansuProvincefloodedSunday.A.damagedB.ruinedC.