题目内容：
{MP3:http://down.233.com/2012/listenfiles/xdftl/Test6.mp3}Mark Twain, who wrote the story we're going to read, traveled quite a lot often because circumstamces, usually (36) circumstances, forced him to. He was born in Florida, Missouri in 1835 and moved to Hannibal, Missouri with his family when he was about 4 years old. Most people think he was born in Hannibal but that isn't true. After his father died when he was about 12, Twain worked in Hannibal for a while and then left, so he could (37) __________ more money. He worked for a while as a typesetter on (38) newspapers and then got a job as a river (39) __ on the Mississippi.
Twain loved this job and many of his books show it. The river job didn't last, however, because of the (40) __________ of the Civil War. Twain, was in the (41) __ Army for just 2 weeks and then he and his whole (42) __________ went west to get away from the war and the army. In Nevada and California Twain (43) __________ for silver and gold without much luck, but did succeed as a writer. (44) __________
(45) __________
(46) __________
根据所听短文，作答36—46 题
请作答（36）______
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