阅读下面短文, 掌握其大意, 然后从21—40各题所给的四个选项（Ａ.Ｂ.Ｃ和D）中, 选出最佳选项。
My neighbor Peter Gate’s life was shadowed for years by the memory of his part in an outdoor adventure that resulted in the death of one of his classmates．He and his wife 21 after six years of marriage．Then the news about Peter changed．His wife Betty came back; he 22 a fine position in a company．
One day he told me what had changed his 23 : I used to think, ‘Nothing can undo （ 消除）what I have done.’ The thought of my guilt(罪恶感) would 24 me in the middle of a smile or a handshake．It put a wall between my wife and me．Then I had an 25 visit from the person I 26 most to see —the 27 of the college classmate who died．“Years ago”, she said, “I found it in my heart, through prayer, to 28 you．Betty forgave
