听对话，选择正确答案。 1. How many inventions did Edison make in his life? [     ] A. One thousand. B. About one thousand. C. Over one thousand. 2. When did Edison die? [     ] A. In 1931. B. In 1913. C. In 1930. 3. Why did someone suggest (建议) turning off all the lights when Edison died? [     ] A. In memory (纪念) of him. B. It's not talked about. C. To save electricity. 4. How long did someone suggest turning off all the lights when Edison died? [     ] A. For several hours. B. For several minutes. C. For a minute. 5. Did people really turn off all the lights when he died? [     ] A. Yes, they did. B. No, they didn't. C. It's not talked about.