新课标全国卷 英语选词填空阅读下面材料，在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。 Are you facing a situation that looks impossible to fix?In 1969，the pollution was terrible along the Cuyahoga River near Cleveland, Ohio. It _61_(be) unimaginable that it could ever be cleaned up. The river was so polluted that it _62_(actual)caught fire and burned. Now, years later, this river is one of _63_ most outstanding examples of environmental cleanup.But the river wasnt changed in a few days _64_ even a few months
