AIheardthatthepollut的精选

问题详情：A:IheardthatthepollutioninthiscityisseriousB:__1___A:Whatkindofpollutionisit?B:___2__A:Whydoyouthinktheairpollutionissodirty?B:__3__A:__4__B:Manybirdscan’tlivehere,theyflytothesouth.A:___5___...