o'henry was a pen name used by an american writer of short stories.his real name was william sydney porter. he was born in north carolina in1862. as a young boy ,he lived a happylife. he didn't go to school for long. but he tired to teach himself everything he needed to know. when he was about twenty years old, o'henry went to texas. there he tired different jobs. he first worked on a newspaper ,and then had a job in a bank ,when some money got lost from the bank ,o'henry was believed to have stolen it .because of that ,he was sent to prison （监狱）,during the three years in proson ,he learned to write stories . after he got out of prison ,he went to new york and the life of the poor there ,people liked his stories because he finished them with a sudden change .this made the readers surprised,
1.o'hery went to prison because _
2.o'henry _before he began writing .
3.o'henry got most materials(材料）for his stories form _
4.people enjoyed reading o'henry's stories because_