KeepourcitycleanWhatcanyouseeinthepictures?2Theairwasclean.Theairisdirty.Let’stalkReadandanswerQ:Whatmakesourcitydirty?Whatmakesourcitydirty?什么使我们的城市变脏?smokefromcarsrubbishinthewaterandthedeadfishfactoriesrubbishSmokeRubbishmakesTips:细读课文第一段,小组展开讨论,把下列句子补充完整。theairdirty.thestreetsmessy(杂乱)anddirty.theriverdirty.LookandsaySmokefromcarsmakestheairdirty.LookandsayRubbishmakesthestreetsmessyanddirty.LookandsayBlacksmokefromfactoriesmakestheairdirty.afactory↓(工厂)factoriesLookandsayTheriverisdirty.There'srubbishinthewaterandthefisharedead.死的
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