Mountain climbers around the world dream about going up Mount Everest (珠穆朗玛峰). It is the highest mountain in the world. But many people who have climbed the mountain have left waste material that is polluting the environment. A team of Americans is planning the largest clean-up effort on Mount Everest. They will make the risky trip up the mountain next month. The team of nine Americans will be guided by more than thirty guides from Nepal (尼泊尔). Their goal is to remove all the trash they see. They will spend three months cleaning up the mountain by gathering oxygen bottles, fuel containers,batteries, drink cans, human waste and other kinds of trash. They are expected to get rid of at least three tons of trash in large bags. Team leader Tom Jackson is making his fourth trip up the mountain. He says he hopes to bring Everest to the condition it was in before the first successful climb fifty years ago. He says he hopes the effort will influence other people to clean up the environment. Human waste on Everest is a major concern. So the clean-up team will take along newly developed equipment to collect and treat human waste. Over the years, the waste has polluted the mountain. In the warm season when the ice melts, the polluted water flows to Nepali villages below. The problem has got worse in recent years because climbing Everest has become fashionable. 1. Mountain climbers successfully reached the top of Mount Everest around ______ ago. A. 50 years B. 40 years C. 30 years D. three months 2. From the passage we can learn that the clean-up effort ______. A. is opposed by the local people B. is the largest one supported by Nepal C. is encouraged by the American government D. is the greatest one ever made on Mount Everest 3. What does the American team plan to do on the trip up the mountain? A. To make Everest the cleanest mountain. B. To tell climbers not to leave waste materials. C. To take away all the trash they could find there. D. To collect and treat human waste before the ice melted. 4. Team leader Mr. Jackson hopes to turn Mount Everest into ______. A. its former state a few years ago B. its original condition half a century ago C. a place with no pollution at all D. the cleanest mountain in the world 5. According to the paragraph five, the problem has got worse in recent years because ______. A. climbing Everest has become fashionable. B. animals have become more. C. human waste has become more fashionable. D. the travel agents have become more.