Mr. Jackson works in a college. He likes reading and often 1 some books from the library. He keeps 2 to the radio every morning and reading 3 after dinner. So he knows much and teaches well. He is also good 4his students. His students 5 him very much. Mike, Mr. Jackson's little son is only nine. He 6 likes reading books. And he often asks his father some questions. Mr. Jackson always thinks his son is too 7to understand him, so he chooses（选择）8 ones to answer. Of course the boy is not satisfied (对……满意) with them.
One day Mike read something about the electric lights and was 9 them. When his father told him to do housework, he went on（继续）thinking 10 it. He asked him 11 questions, and his father answered all. Then his father said proudly（自豪地），“Fathers always know 12 than sons!” The boy thought for a while and said, “ 13 .” “Oh, why?” Mike didn't answer but asked. “ 14 invented（发明） the electric lights?” “Thomas Edison.” answered Mr. Jackson “Why didn't his father invent them then?” Mike asked again.
Looking at his son, Mr. Jackson didn't know 15 to answer.
