阅读理解 It amazed me-every time I saw Joe he was smiling.It didn't matter whether he had to stop at a stop light,or if he was the seventh person in line at the bank,and the teller (出纳员) ended her job just before he got there.Joe always smiled.It made me wonder why he always seemed so happy. Having observed Joe with other people,I noticed something else too.Joe asked people how they were doing,and really seemed to listen to their answers.He showed pity tosomeone who was hurting,and had kind words,and offered to help in any way he could. It made me think.What if I tried to smile more?An experiment began when I went to the supermarket. I smiled as I went up and down the supermarket and people I didn't even know smiled back at me.Some even spoke!The little kid in the cart who was giving his mother a hard time saw me smile；he stopped talking and then made a shy attempt at a smile.The man in the cart for the disabled needed help to reach for something,and I got it for him.The smile even transferred (转移) over to him,and he thanked me. As I drove home,I was smiling.Now I know a smile is a small thing,but what if we all tried to smile a few more times each day?I couldn't believe how great I felt.Nothing in my life had changed,but maybe it had.What I had learned was that such a small thing could lift not only my spirits,but also the spirits of those around me.So smile! 1. What did the writer wonder? A. Why bad things never happened to Joe. B. What kind of person Joe was. C. Why Joe always seemed so happy. D. How to be as happy as Joe. 2. What do we know about Joe from Paragraph 2? A. He has nothing to worry about. B. He lives a very hard life. C. He is kind and ready to help others. D. He often asks others to smile. 3. What experiment did the writer do? A. He smiled at others in the supermarket. B. He bought people things in the supermarket. C. He helped anyone who needed help. D. He said kind words to others. 4. According to the passage,how was the writer's experiment? A. It was a failure. B. It proved nothing. C. It was unacceptable. D. It was quite satisfying. 5. The writer wrote this passage most probably to________. A. explain why people smile B. tell us something about Joe C. tell us the true meaning of life D. suggest people smile more to others