参考答案：B

解析：[听力原文]29-31
Every student of American history knows that George Washington, John Adams, and Thomas Jefferson were the first three Presidents of the United States, but what else do they know about these interesting none George Washington was a quiet man. (31) lie liked to hunt and fish. He liked to give parties, and he also liked to go to bed early. His parties always ended at 9:00 pm. After he was retired, (31)lie lived on his farm.
John Adams was a bright and serious man. He liked to study law and history. After he was retired, he returned to his home in Boston. He liked to write about politics. He wrote many famous letters to the next president, Thomas Jefferson.
Thomas Jefferson was a very talented man. In some ways he was like George Washington. (31)He liked living on a farm, and he liked riding horses and hunting. tie had other interests, too. He liked to play the violin, liked to stag, and liked speaking foreign languages. (30) After he was retired, lie returned to one of his other interests, designing the buildings for the University of Virginia.
When you are studying history, remember that the people in the books arc more than names. Don’t be afraid to go to the library and find out more about their qualities.
29. What is the main idea of this passage