根据课文的内容在每个空白处填入一个恰当的词。 

I had planned to stay at this job for only two days. But now I ' m going to stay. The exercise is great. The lifting61easier with every load, even if my left shoulder stays sore. I become faster and neater62time goes by. I 'm outdoors in clean air. And, contrary63what people think, I don't get dirty on the job. 

I have made64my mind, too, to go on saying hello in backyards. It doesn' t do any harm, and it still feels right. Frankly,I ' m proud.I'm doing65essential task,“ like a police officer or a fire fighter.” I left this country a little cleaner66 .I found it this morning. Not many people can say that tonight. 

John Gardener has said that a society67praises its philosophers and looks down on its plumbers is68for trouble. “Neither its pipes nor its theories will hold69,” he warns. He might have gone a step further and called70respect for both our economists and our trashmen ; otherwise they'll both leave trash behind.