阅读理解 In 1963,former Senator Gaylord Nelson began to worry about our planet. Nelson knew that our world was getti ng dirty and that many of our plants and animals were dying. He wondered why most people weren't trying to solve these problems. He talked to other lawmakers and to the President. They decided that the President would go around the country and tell people about these problems. He did, but still not enough people were working on it. Then in 1969, Senator Nelson had another idea. He decided to have a special day to teach everyone about the things that needed changing in our environment. He wrote letters to all of the colleges and put a special article in Scholastic Magazine to tell them about the special day he had planned. On April 22,1970, the first Earth Day meeting was held. People all over the country made promises to help improve the environment. Since then, Earth Day has spread all over the planet. People all over the world know that there are problems we need to work on and this is our special day to look at the planet and see what needs changing. Isn't it great? One person had an idea and kept working until everyone began working together to solve it. 1. The passage mainly talks about _____. A. the importance of Earth Day B. the person who planned the Earth Day C. the history of Earth Day D. the first Earth Day 2. Why did  Senator Gaylord Nelson  worry about our planet? A. The world was getting dirty B. Many plants and animals were dying. C. Few people cared about the earth D. All of the above. 3. Nelson did all this to_____ A. become famous B. make more laws C. change the environment D. make people care about the environment 4. It took Nelson _____ years to get people pay much attention to the earth. A. 10 B. 7 C. 6 D. 15