20．A　解析：生活总是为我们提供机会，让我们多迈出一步或者做一件对某人产生影响的善事。故选A项。

　　Ⅲ.语法填空

　　阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

　　Having a goal based on love is the greatest life insurance in the world.If you had asked my dad 1.______ he had always smiled，you would have found his answer 2.________(especial)simple：“To make my wife happy.”

　　Mom and Dad met when they 3.________(be)nine.Every day before school，they met on a park bench with their homework.Mom corrected Dad's English and he did the same with her math.Upon 4.________(graduate)，their teachers said that the two of them were the best“students”in the school.They took their time building their relationship，even though Dad always knew she was the girl for him.Their first kiss occurred 5.________they were 17，and their romance continued to grow into their 80s.

　　Just how much power their relationship created was brought to light in 1964.Dad was 6.________(tell)by the doctor that he had cancer and estimated that he had six months to one year 7.________(leave)at the most.“I'm sorry to disagree with you，Doctor，”my father said.“8.________I'll tell you how long I have.One day 9.________(long)than my wife.I love her too much to leave the planet without her.”

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