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

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).
【K1】
选项
答案was
解析 本题考查时态。句意：很难想象这条河还能被净化。根据语境可知，此处应为过去时，主语是单数。故填was。
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