单元小结Canyoupredictwhatourlifewillbelikeinthefarfuture?Areyouoptimisticabout单元主干加沥一技文#衣it?Now,Tdliketotalkaboutthefuture.诊汀复规许训高焕渊无匕Ithinkpapermoneywilldefinitelybeonthewayoutandeventuallybereplacedbycreditcards.Forastart,papermoneyisgn“teasytocarry.Secondly,issaferforustousecreditcards.Thirdly,wecanplaceordersonlineandpaybycreditcardsratherthanicash,Naturalresourcessuchascoalandoilarerunningout.Bythetimeweusethenup,wWeW训havetorelyonalternativeenergy,suchassolarandWindenergy