【正文】 很多河流湖泊已經(jīng)受到嚴(yán)重污染。t take all of your time. Don39。t important to trees at all D. trees can take in O2 and let out CO2 B Earth Day is birthday! It is a special day that celebrates the earth. Earth Day was born on April 22, 1970, in San Francisco, California. Every year, over 100 different countries join together in the celebration of Earth Day. It is the largest, most celebrated environmental event around the world. On Earth Day, we remember nature and learn ways to protect our environment. You can do lots of good things for the earth. Here are some ideas to keep in mind. *Recycle cans, bottles, and paper. Save them at home and at school, and help your family recycle them. *Ride your bike or walk to school to keep the air clean. *Use both sides of your paper at school and at home. *Turn off the TV when you’ve finished watching it. *Don’t leave the water running while you brush your teeth. *Turn off the lights when you leave the room. And remember: Don’t ever think you’re not important to our earth. You are! ( )36. When is Earth Day? A. On April 22. B. On April 23. C. On May 22. D. We don’t know. ( )37. How many ideas are mentioned to help save electricity? A. One. B. Two. C. Three. D. Four. ( )38. What is Earth Day about? A. Cars. B. Lights. C. Paper. D. Environment. ( )39. Which of the following is not talked about in the passage? A. How to save water. B. How to keep the air clean. C. How to keep the water clean. D. How to recycle something. ( )40. From the last sentence, we know that _____. A. everyone should do good things to the earth B. everyone is necessary in the world C. you should remember Earth Day D. Earth Day is the most important day C Young people can have problems with their minds. Some students bee worried because they have to study very hard. Others have trouble getting on well with people like their parents and classmates. Liu Wei, a Junior 2 student from Hefei, could not understand his teacher and was doing badly in his lessons. He became so worried about it that he started to cut his finger with a knife. Another student, 14yearold Yan Fang from Guangzhou, was afraid of exams. She got very worried in one, and when she looked at the exam paper. She couldn’t think of anything to write. A recent report from Jiefang Daily says about 18% of Shanghai teenagers have mental （ 心理的 ， 精神的 ） problems. Their troubles include（ 包括 ） bring worried and very unhappy. And having problems in learning and getting on with people. Many students who have problems won’t go for advice or help. Some think they will look stupid（愚蠢） if they go to see a doctor. Others don’t want to talk about their secret. Liang Yuezhu, an expert (專家 ) on teenagers from Beijing Aiding Hospital has the following advice for teenagers: *Talk to your parents or teachers often *Take part in group activities and play sports *Go to see a doctor if you feel unhappy or unwell ( )41 The students who often bee worried or have trouble getting on with others may have _______. A. mental problems B. a headache C. knives with them D. no parents ( )42. Liu Wei cut his finger with a knife because ________. A. he was afraid of his teacher B. he wanted to