Areyoufacingasituationthatlooksimpossibletofix？In1969，thepollutionwasterriblealongtheCuyahogaRiverCleveland，Ohio．It（61）___（be）unimaginablethatitcouldeverbecleanedup．Theriverwassopollutedthatit（62）

　　Areyoufacingasituationthatlooksimpossibletofix？

　　In1969，thepollutionwasterriblealongtheCuyahogaRiverCleveland，Ohio．It（61）___（be）unimaginablethatitcouldeverbecleanedup．Theriverwassopollutedthatit（62）___（actual）caughtfireandburned．Now，yearslater，thisriverisoneof（63）___mostoutstandingexamplesofenvironmentalcleanup．

　　Buttheriverwasn'tchangedinafewdays（64）___evenafewmonths．Ittookyearsofwork（65）___（reduce）theindustrialpollutionandcleanthewater．Finally，thathardworkpaidoffandnowthewaterintheriveris（66）___（clean）thanever．

　　Maybeyouarefacinganimpossiblesituation．Maybeyouleaveahabit（67）___isdrivingyourfamilycrazy．Possiblyyoudrinktoomuchordon'tknowhowtocontrolyourcreditcarduse．Whenyoufacesuchanimpossiblesituation，don'tyouwantaquickfixandsomethingtochangeimmediately？

　　Whilethereare（68）___（amaze）storiesofinstanttransformation，formostofusthe（69）___（change）aregradualandrequirealotofeffortandwork，likecleaningupapollutedriver．Justbe（70）___（patience）．