Withthe（61）___（develop）ofindustry，airpollutionisgettingmoreandmoreserious．InShanghai，manypeoplesufferfromdifferent（62）___（kind）ofillnessesbecauseofairpollution．Airpollutonis（63）___（main）causedb

　　With the（61）___ （develop） of industry，air pollution is getting more and more serious．In Shanghai，many people suffer from different（62）___（kind）of illnesses because of air pollution．

　　Air polluton is（63）___（main） caused by the following easons．One factor is that half of the problem is caused by vehicles．There are more and more cars and buses on the road，（64）___give off poisonous gases.35% of air pollution is caused by factories．（65）___factor is smoking．It is well-known to all（66）___smoking does harm to others'health as well as to that ofthe smokers．We should take some measures to fight against pollution．New fuel can be used to take（67）___ place of gas．We can plant more trees，grass and flowers，（68）___（balance） the environment．All in all，if everybody realizes the（69）___（important） of the environment protection and does something to stop pollution，the problem（70）___（solve）．