Are you facing a situation that looks impossible to fix? In 1969, the pollution was terrible along the Cuyahoga River near C

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问题     Are you facing a situation that looks impossible to fix?
    In 1969, the pollution was terrible along the Cuyahoga River near Cleveland, Ohio. It【K1】______ (be) unimaginable that it could ever be cleaned up. The river was so polluted that it【K2】______ (actual) caught fire and burned. Now, years later, this river is one of【K3】______ most outstanding examples of environmental cleanup.
    But the river wasn’ t changed in a few days【K4】______ even a few months. It took years of work to reduce the【K5】______ (industry) pollution and clean the water. Finally, that hard work paid off and now the water in the river is【K6】______ (clean) than ever.
    Maybe you are facing an impossible situation. Maybe you have a habit【K7】______ 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【K8】______ (amaze) stories of instant transformation, for most of us the【K9】______ (change) are gradual and require a lot of effort and work, like cleaning up a polluted river. Just be【K10】______ (patience).
【K6】

选项

答案cleaner

解析 本题考查比较级。句意:最终,这种艰苦的工作收到了回报,现在,河水比以往任何时候都要干净。“比较级+than…”为比较级的同定结构。故填cleaner。
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