阅读下面短文，掌握其大意，然后从A、B、C、D四个选项中选出可以填入空白处的最佳选项。
Everybody has his own hero in mind and is always trying to copy his behaviors in life. As for me, my 1 is just that man. My grandfather had a small farm. He also worked in a 2.
One autumn, most of the farmers in the village were all 3, so he promised to help his neighbor harvest the corn as he often did. 4, after harvesting his own corn, Grandpa's little corn machine broke. What was 5, the factory where Grandpa worked made the workers have extra work. He had to 6 the farm early and didn't get back until very late. It now seemed 7 to help out his neighbor because he really had no free time.
One night, Grandpa 8 that he wouldn't let his neighbor's harvest rot (腐烂) in the field. Without a 9 , he'd harvest it by hand.
“I don't think you'd have time to do it,” said my grandma. “10, it'd be too dark to do anything at night.”
“I know of one night that I could do it!” he 11 . “There's still one more full moon in October. If the 12 is clear, I think I can do it.”
A few days later, after a long shift (轮班) at the factory, my grandpa went to the 13. The weather was cold but clear. He cut all the corn through the night to 14 his word.
Sometimes, when I want to put off responsibilities, I'd see my grandfather 15 corn in the light of the harvest moon. Behind him, row after row of corn stocks (玉米秸秆) stand at attention in respect for a man who keeps his word.
