3题英语选择题Whathasmadehimupsetrecently?()alonetofacethetroublesomeA.leftB.beingleftC.havingleftD.toleaveAsweknow,itishumanactivitythat()theglobalwarmingA.hasresultedfromB.haveresultedfronC.hasledtoD.hav

　　3题英语选择题

　　Whathasmadehimupsetrecently?

　　()alonetofacethetroublesome

　　A.leftB.beingleftC.havingleftD.toleave

　　Asweknow,itishumanactivitythat()theglobalwarming

　　A.hasresultedfromB.haveresultedfronC.hasledtoD.haveledto

　　Inordertoknowmorepeople,itisimportant()yourcontactlistbeyondjustfamilyandfriends

　　A.expandingB.toexpandC.expanded

　　D.havingexpanded

　　请分析句子并解释