阅读下面短文，掌握大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳答案。
When I was in junior high, the eighth grade bully(a欺凌弱小者) struck me in the stomach. Not only did it 1, but the shame and embarrassment were almost impossible to bear. I wanted 2 to even the score(摆平)! I 3to meet him by the bike racks the next day and let him have it.
For some reason, I told my plan to Nana, my grandmother—a big4. She gave me one of her hourlong5. It was a total6, but among other things, I vaguely 7her telling me that I didn't need to worry about him. She said, “Good deeds beget (产生) good results, 8 evil deeds beget had results.” I told her, in a nice way, that I thought she was right. I told her that I did good things all the time, and all got9was a strike in the stomach. She stuck to her opinions, 10.
It 11 me 30 years to understand the 12of her words. Nana was living in a boardandcare home in Laguna Hills, California. Each Tuesday, I 13 and took her out to dinner. We drove to a nearby simple little restaurant. I 14pot roast for Nana and a hamburger for myself. The food arrived and as I dug in, I noticed that Nana wasn't eating. She was just staring at the food on her plate. 15my plate aside, I took Nana's and cut her meat into small pieces. I then placed the plate back. 16she was very weakly, and with great difficulty, forked the meat into her mouth, I was struck with a(n) 17that brought instant tears to my eyes. Forty years previously, as a little boy sitting at the table, Nana had always 18 the same to me.
It had taken 40 years, but the good deed had been 19. Nana was right．We harvest exactly 20we sow.“Every good deed you do will someday come back to you.” What about the eight grade bully? He ran into the ninth grade bully.
