Unit23PassageA话题:环境与污染词数:242参考用时:8分钟Theearthisourhome
Wemusttakecareofit
Lifetodayiseasierthanitwas1______yearsago,butithasbroughtsomenewproblems
Oneofthebiggestproblemsispollution
Wecanseeit,smellit,drinkitandevenhearit
Manhaspollutedthe2_____
Themorepeople,themorepollution
Manyyearsago,theproblemwasnotsoseriousbecausetherewerenotso3____people
Whenthelandwasuseduportheriverwasnotcleaninaplacemanwentto4_____place
Nowmanisslowlypollutingthewholeworld
5____pollutionisstillthemostserious,it'sbadfor6____thingsintheworld
Manycountriesdon'tletpeopleburn7____forairinthehousesandfactoriesinthecity
PollutionbySO2isnowthemostdangerouskindofairpollution
It'scausedbyheavytraffic
Peoplesayit's8_____toridebikes
Whenyouareriding,thereisnopollution
Butevenindevelopedcountries,mostpeopl