1. 【2014·新课标Ⅰ】
第二节 阅读下面材料，用不多于3个单词的正确形式填空
Are you facing a situation that looking impossible to fix?
In 1969, the pollution is terrible along the Cuyahoga River near Cleveland, Ohio. It ______61(be)imaginable that it could be ever be cleaned up. The rive was so polluted that it ______62(actual) caught fire and burned. Now year late,this rive is one of_______63most outstanding examples of environmental cleanup.
