阅读理解,在线等!In the United States, a university professor is giv

阅读理解,在线等!
In the United States, a university professor is given a few months of freedom from his duties about every seventh year for travel or advanced study. This period of freedom from teaching is called a "study or research leave". Its purpose is to give the professor experiences that will make him a wiser person and a better teacher when he returns to his university.
Few study leaves are interesting enough to be described in national newspapers and magazines. Recently, however, there was an exception. The public learned how Dr. John R. Coleman, president of Haverford College, had spent his study leave.
At the age of 51, Dr. Coleman was determined to escape from university life for a few months and to get a variety of experiences in the world of work. He especially wanted to learn about people. People who do hard physical labor were especially interesting to him.
"I wanted to get away from the world of words and political matters and parties-the things a president does," Dr. Coleman later explained to news writers. "As a college president you begin to take yourself very seriously and to think you have power you don't. You forget things about people. I wanted to relearn things I'd forgotten."
Telling no one of his plans, Dr. Coleman started his study leave on a farm in Canada, hundreds of miles from his college. Getting up at 4:30 each morning, working thirteen hours a day in fields, he prepared himself physically for his next job, digging ditches in Atlanta, Georgia. After that, the college president washed dishes in a Boston restaurant. During the last ten days of his leave, he worked as a garbage collector.
6. The first paragraph is mainly about ________.
A. why a professor should be free from his duties every seventh year
B. how professors spend their study leave
C. what a study leave is and its purpose
D. how a study leave makes a professor a wiser person and a better teacher

7. A study leave is a period of freedom from duties allowed to a university teacher who has taught ________.
A. for six years since his last leave
B. for seven years since his last leave
C. for a term since his last leave
D. for a university year since his last leave

8. People learned about Dr. Coleman's unusual experiences from ________.
A. the people he works with
B. the boss of a Boston restaurant
C. the Canadian newspapers and magazines
D. the U.S. newspapers and magazines
还有两个问题，字数限制，回答后补充，谢谢

仅供参考：
6.C 7.A 8.D
再问： 9. Dr. Coleman carried out his study leave in an unusual way because he ________. A. hated his university life, especially his job as a president B. wanted to learn about people, especially people who do hard physical labor C. wanted to make himself known to the public D. wanted to write articles about people and have them printed in newspapers and magazines