You must have read some stories about Thomas Edison. He was a great American 1.______ (invent). When he was a 2.______ (children), he was always asking questions and trying out new ideas. No matter 3.______ hard it was, he never gave up.
　　Young Thomas was in school for only three months. His teacher didn’t understand why he had so many strange questions. Most of 4.______ (they) were not about his lessons. The teacher didn’t want to teach Thomas any 5.______ (long). He asked his mother to take the boy home. His mother taught him to read and write, and she found him 6.______ good pupil. He learnt very fast and became very interested in science.
　　One day, Thomas saw a little boy 7.______ (play) on the railway tracks at a station. A train was coming near quickly, and the boy was too 8.______ (frighten) to move. Thomas rushed out and carried the boy to 9.______ (safe). The boy’s father was so 10.______ (thank) that he taught Thomas to send messages by telegraph.