,Unit4,Mammoth猛犸,Saber-toothedtiger剑齿虎,dinosaur,Dieout,Theyarelovely,buttheirnumberis_,sotheybecomerareanimals.,Becausetheyare_disappearing,wecallthem_.,Luckily,wearetakingactiontoprotectthesevaluableanimalfrom_.,decreasing,indangerof,endangeredspecies,dyingout,Giantpanda,Letstalk,1.Keywordsofthisvideoclip2.whatsyourattitude?,CausesofEndangerment,Over-hunting,Pollution,Foodshortage,disease,Destructionofhabitat(栖息地）,Reasons:,brainst
