Mr Clarke works in a middle school. He likes reading and often   36   some books from the library. He keeps   37   to the radio every morning and reading   38   after supper. So he knows much and teaches well. His   39   worship (崇拜)him very much. Mike, Mr Clarke's little son, is only nine. He   40   likes reading books. And he often asks his father some questions. Mr Clarke always thinks he's too   41   to understand him and choose   42   ones to answer. Of course the boy is not satisfied with it.

　　One day Mike read   43   about the electric lights and was   44   it. When his father told him to do some housework, he went on thinking of it. He asked him   45   questions, and his father answered all. Then his father said proudly, “Fathers always know  46  than sons!”

　　The boy thought for a while and said, “  47  !”

　　“ Oh? Why?”

　　Mike didn't answer and   48  , he asked, “Who invented the electric lights?”

　　“Thomas Edison.”  49   Mr Clarke.

　　“ Why didn't his father invent them, then?”

　　Looking at his son, Mr Clarke didn't know   50   to answer!

36. A. finds                  B. sells                        C. buys                D. borrows

37. A. listening             B. watching                 C. going                      D. touching

38. A. newspapers               B. letters                       C. stories              D. messages

39. A. teachers             B. parents                     C. classmates               D. students

40. A. also                   B. never                       C. even                 D. only

41. A. old                    B. clever                      C. young              D. able

42. A. more difficult     B. the most difficult       C. easy                 D. the easiest

43. A. something          B. nothing                     C. everything               D. anything

44. A. worried about     B. interested in              C. afraid of           D. angry with

45. A. few                   B. little                         C. a little               D. a few

46. A. more                  B. most                       C. less                  D. least

47. A. I don't think so. B. Neither am I.            C. I agree.            D. So do I.

48. A. instead               B. carefully                  C. quickly             D. brightly

49. A. asked                 B. answered                  C. told                 D. answers

50. A. when                 B. what                       C. where              D. which

Tom’s favourite food is meat.　He likes meat ______.