完形填空. Mr. Clarke works in a middle school.  He likes reading and often __1__ some books from the library. He keeps __ 2 __ to the radio every morning and reading __ 3 __ after supper. So he knows much and teaches well. His __ 4 __ worship (崇拜) him very much. Mike, Mr. Clarke's little son, is only nine. He __ 5 __ likes reading books. And he often asks his father some questions. Mr. Clarke always thinks he's too __ 6 __ to understand him and chooses __ 7 __ ones to answer.  Of course the boy is not satisfied with it. One day Mike read __ 8 __ about the electric lights and was __ 9 __ it. When his father told him to do some housework, he went on thinking of it.  He asked him __ 10 __ questions, and his father answered all. Then his father said proudly, 'Fathers always know __ 11 __ than sons!' The boy thought for a while and said, '__ 12 __' 'Oh? Why?' Mike didn't answer and asked __ 13 __ , 'Who invented the electric lights?' 'Thomas Edison,' answered Mr. Clarke. 'Why __ 14 __ his father invent them then?' Looking at his son, Mr. Clarke didn't know __ 15 __ to answer! (     ) 1. A. finds (     ) 2. A. hearing (     ) 3. A. newspapers (     ) 4. A. friends (     ) 5. A. ever (     ) 6. A. old (     ) 7. A. difficult (     ) 8. A. something (     ) 9. A. worried about (     ) 10. A. few (     ) 11. A. the more (     ) 12. A. I don't think so (     ) 13. A. although (     ) 14. A. not (     ) 15. A. when B. buys B. listening B. letters B. teachers B. also B. big B. the hardest B. nothing B. good at B. little B. more B. I agree B. instead B. did B. what C. borrows C. watching C. stories C. classmates C. never C. clever C. the easiest C. anything C. interested in C. a little C. less C. So you are C. too C. didn't C. which D. lends D. going D. messages D. students D. only D. young D. no D. everything D. afraid of D. a few D. the less D. You're right D. though D. doesn't D. where