二、完形填空(共15小题，计分15分)

　　阅读下面短文，掌握其大意，然后从21—35各题所给的四个选项中选出一个最佳选项。

　　Mr Clarke works in a middle school. He likes reading and often 21 some books from the library. He keeps 22 to the radio every morning and reading 23 after supper. So he knows much and teaches well. His 24 worship(崇拜) him very much. Mike, Mr Clarke’s little son, is only nine. He 25 likes reading books. And he often asks his father some questions. Mr Clarke always thinks he's too 26 to understand him and chooses 27 ones to answer. Of course

　　the boy is not satisfied with(对…满意) it.

　　One day Mike read 28 about the electric lights (电灯) and was 29 it. When his father told him to do some housework, he went on thinking of it. He asked him 30 questions, and his father answered all. Then his father said proudly, "Fathers always know 31 than sons!"

　　The boy thought for a while and said, 32 !"

　　"Oh? Why?"

　　Mike didn’t answer and asked, 33 , "Who invented the electric lights?" 34 "answered Mr Clarke.

　　"Why didn't his father invent them, then?"

　　Looking at his son, Mr Clarke didn't know 35 to answer!

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

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