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20. C 主旨大意题。文章开篇点题，讲的是通过在星期六和星期日的下午播放一些电视节目来吸引那些高收入的人来看，给广告带来了极大的效益。说明体育在电视广告中起着很重要的作用。故选C。
Ⅲ.One possible version：
I learned the passage that when a poor boy was hungry, a young woman gave him a glass of milk. Years later, as a famous doctor, he saved the woman's life and returned the final bill to her in return for her help.
Greatly inspired by the story, I learn that once helped by others, we should be grateful. If my friend is in need of help, I will comfort him and spare no effort to help him out.
It occurred to me that once I was about to go home when it started to rain heavily. Having left my umbrella at home, I could do nothing but stay in the classroom. At this moment, my classmate Henry gave me his umbrella. His kindness and willingness to help greatly impressed me. Several days before an important exam, Henry fell seriously ill. Every day after school, I went to the hospital to accompany him, helping him catch up with his lessons. Eventually, he got a good mark.
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高考英语一轮复习课时作业(七)Unit2TheOlympicGames新人教版必修2
