阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答卷标号为3l—40的相应位置上。
Two things I did may have caused people 31 (think) that something is wrong with me. The first was when my wife asked me to have the sitting-room clock 32 (repair). I drove into the market place of our little town and, clock under arm, entered a shop. Only it was the meat shop. 33 my thoughts far away, I stood staring into the shop-keeper’s eyes. I 34 (be) his customers for a long time and the good man smiled at me.
This went on for several very long seconds before I realized where I was. There is no doubt that I should have calmly bought a pound of meat, 35 I merely nodded briefly and left.
The other man in my town who probably thinks I am mad is Mr. Smith. Some years ago he was manager of Mead’s Shop, and he and I knew each other quite well. One day, he 36 (stand) in the doorway of his shop when I passed. My brain was on some distant problem and my eyes stared into space.
“Hello, Mr. Herriot,” I heard his voice. I turned a blank gaze on him—I just had no idea 37 he was though his face was familiar. Then I saw 38 word “MEAD” in foot-high letters above the shop window.
“Good morning, Mead,” I cried heartily and continued my way. I had gone only a few steps before I realized that my greeting had been 39 (polite). I turned back and said to him again, “Good morning, Mister Mead.”
It was only when I had turned the corner of the street that I realized, too late, 40 his name was Tony and the time was late afternoon.