阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
O. Henry was a pen name used ________  an American writer of short stories. His real name was William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived   ________   exciting life. He did not go to school for very long, but he managed ________ (teach) himself everything that he needed to know. When he was about 20 years old, Henry went to Texas, ________   he tried different jobs. He first worked on a newspaper, and then had a job in a bank. When some money was ________  (miss) from the bank, O. Henry was believed to have stolen it. Because of that, he was   ________  (sentence) to prison. During the three years in prison, he learned to write short stories. After ________ (go) out of prison, he went to New York ________ continued writing. He ________ (write) mostly about New York and the life of the poor there. People liked his stories, because simple as the tales were, they would finish with a ________  (suddenly) change at the end to the reader’s surprise.