题目内容：
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出空白处的最佳选项，并在答题卡上将该项涂黑。The True Story of Treasure lsland
It was always thought that treasure Island was the product of Robert Louis Stevenson’s imagination.__ 36,recent research has found the true story of this exciting work.
Stevenson,a Scotsman,had lived __ 37for many years.In 1881 he returned to Scotland for a __ 38.With him were his American wife Fanny and his son __ 39.
Each morning Stevemson would take them out for a long __ 40over the hills.They had been __ 41this for several days before the weather suddenly took a turn for the worse.Kept indoors by the heavy rain,Lloyd felt the days __ 42.To keep the boy happy,Robert asked the boy to do some __ 43.
One morning,the boy came to Robert with a beautiful map of an island.Robert __ 44that the boy had drawn a large cross in the middle of __ 45.“What’s that?” he asked.“That’s the __ 46treasure,”said the boy.Robert suddenly __ 47something of an adventure story in the boy’s __ 48.While the rain was pouring,Robert sat down by the fire to write a story.He would make the __ 49a twelve-year-old boy,just like Lloyd.But who would be the pirate（海海盗）？
Robert had a good friend named Henley,who walked around with the __ 50of a wooden leg.Robert had always wanted to __ 51such a man in a story. __ 52Long John Silver,the pirate with a wooden leg,was __ 53.
So,thanks to a __ 54September in Scotland,a friend with a wooden leg, and the imagination of a twelve-year-old boy,we have one of the greatest __ 55stories in the English language.
A.However
B.Therefore
C.Besides
D.Finally
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