题目

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 wasn't changed in a few days __64__ even a few months. It took years of work __65__ (reduce) the industrial pollution and clean the water. Finally, that hard work paid off and now the water in the riI must return the camera to Li Lei. I ________ it for-two weeks. [　　] A．keepB．borrowed C．have keptD．have lent