Are you facing a situation that looks impossible to fix?
In 1969，the pollution was terrible along the Cuyahoga River near Cleveland，Ohio．It___（be）unimaginable that it could ever be cleaned up．The river was so polluted that it____（actual）caught fire and burned．Now，years later，this river is one of____most outstanding examples of environmental cleanup．
But the river wasn't changed in a few days______even a few months．It took years of work____（reduce）the industrial pollution and clean the water．Finally，that hard work paid off and now the water in the river is____（clean）than ever．
Maybe you are facing an impossible situation．Maybe you have a habit___is driving your family crazy．Possibly you drink too much or don't know how to control your credit card use．When you face such an impossible situation，don't you want a quick fix and something to change immediately?
While there are____（amaze）stories of instant transformation，for most of us the____（change）are gradual and require a lot of effort and work，like cleaning up a polluted river．Just be____（patience）．