In the life, everybody has a lot of problem. For example, I am a wonderful student. I can usually get a high mark. I study very well. But sometimes I reckless of the examination, so, I cant do it very well. After the exam, I blow it. Most
Environmental problems are becoming more and more serious all over the world. With the development of industry and agriculture, cars make great noises and give off poisonous gas. Trees on the hills have been cut down,and waste water is bei