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1. Every year about 40,000 people attempt to climb Kilimanjaro, the highest mountain in Africa. They _ with them lots of waste. The _ might damage the beauty of the place. The glaciers(冰川) are disappearing, changing the _ of Kilimanjaro. Hearing these stories, I'm _ about the place - other destinations are described as "purer" natural experiences. However, I soon _ that much has changed since the days of disturbing reports of _ among tons of rubbish. I find a _ mountain, with toilets at camps and along the paths. The environmental challenges are _ but the efforts made by the Tanzania National Park Authority seem to be _. The best of a Kilimanjaro _, in my opinion, isn't reaching the top. Mountains are _ as spiritual places by many cultures. This _ is especially evident on Kilimanjaro as _ go through five ecosystems (生态系统) in the space of a few kilometers. At the base is a rainforest. It ends abruptly at 3,000 meters, _ lands of low growing plants. Further up, the weather _ - low clouds envelope the mountainsides, which are covered with thick grass. I _ twelve shades of green from where I stand. Above 4,000 meters is the highland _ : gravel (砾石), stones and rocks. _ you climb into an arctic-like zone with _ snow and the glaciers that may soon disappear. Does kilimanjaro _ its reputation as a crowded mountain with lines of tourists ruining the atmosphere of peace? I found the opposite to be true.
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2. Regardless of the weather or the distance, Paul Wilson will make sure low-income students in his neighbourhood arrive at their college classes on time. A retired enginner, 76-year-old Wilson has been _ free rides to college students for the past eight years. Since he first started _ his car to the young people, Wilson has _ an astonishing 64,000 miles, and has had countless pleasant and often humorous _ with the students he transports to and from school. The students who he's _ have gone on to become physicians, teachers and ngineers, but what they've also got out of their time in school is finding a role model and a friend in Wilson. Some students _ call him "Grandpa". Tina Stern _ rides from Wilson for all her four years in college, and the trips meant much more to her than just free _ . "It's not just a ride; you're not just sitting there in _ silence or with your headphones on," Stern said. "He asks you questions and actually _ the answers, so the next time you ride with him, he'll _ those things." Wilson first worked as a driver through a student-support programme of the non-profit organisation, On Point for College. Although the _ asks the members only to drive students to and from their classes, Wilson often goes _ to ensure the welfare and safety of the students. If they have problems with registration, Wilson is there to _ them. If they run out of certain daily necessities, Wilson will drive to the nearest store and purchase what's needed. If a student gets hungry on the long drives to and from school, Wilson never _ to buy them a meal. For many students, Wilson's help is not only appreciated, it's also entirely _ for them to be able to complete their college education. Some students don't have a reliable car, while others have to _ vehicles with parents who work six days a week. For them, riding with Wilson has _ them to complete their education — but according to Wilson, he benefits just as much from the _. "I just love driving, and I love these kids," Wilson said. "It's such a(n) _ to be a part of these kids' lives, even just for a few hours, geting to know them and hearing their stories."
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3. There are lots of ways to raise awareness for a cause. Usually, the _ the idea is, the more it gets noticed. And that's precisely why one _ Frenchman has caught our attention. Baptiste Dubanchet is biking across Europe, surviving _ on discarded (丢弃) food. The three-month, 1,900-mile journey from Paris to Warsaw is Dubanchet's _ of raising awareness of food waste in Europe and throughout the world. As you can _ , the trip is no piece of cake. While restaurants _ tons of food each year, much of it remains inaccessible because of _ garbage containers, health regulations, or business policies. Only about one in ten places _ him food that would otherwise be discarded. For legal _ most restaurants have a policy against _ food waste. "Some people have even _ their jobs by giving me food," Dubanchet said. What's _ interesting is the attitude various cities have toward Dubanchet's cause. Berlin has been the _ while the most difficult was the Czech town of Pilsen. There, he had to _ at some 50 different stores or restaurants before finding food. The _ is all the more serious when you consider the _ exercise required to bike from France to Poland. "I have to get food _ because after all the biking I am tired and I need the _ ," Dubanchet explained. "Is my _ full or empty? That is the most important thing, not waht I am eating." He aims to _ his journey by mid-July. With any luck, he'll turn a few more heads in the process.
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4. I was ready to pay for my bananas at the grocery one night, when fear seized me. My wallet was gone. I could only have left it on the G9 bus,which was now speeding in the dark to some _ station. The _ moment was quickly followed by mental math. How much time and money would it cost to replace the _ of that little wallet? The credit cards, the driver's license, the cash, all lost to the bus. Two hours later, back at my house, I heard a knock on the door. My husband _ it while I was on the phone in the dining room. "Does jennifer live here?" I heard a lady say. In my husband's hand was my wallet, with not a penny _ . She left before I could _ make it to the door to offer my thanks. After sharing the story online, I heard from someone, who _ the lady as Erin Smith. Without _ , I called to thank her. She said she _ my wallet on a bus seat. She _ that going to a stranger's house was a _ move, but she decided to take the chance. "If I were in that _ , I would want someone to try to find me", she said. This one stranger responded beautifully to my small _, but she actually wasn't the only one. Right after Erin _ my wallet on the bus, she posted a picture of my driver's license to an online forum(论坛), trying to see _ anyone knew me. No sooner did she leave my doorstep than I had emails from two women whose kids go to my son's nursery and who recognized my face. I've never _ words with those moms beyond small talk, but they wanted to help. I read that people are more divided than ever, but that's not how the people I _ tend to act. _, I feel blessed someone had wanted to help a stranger. Erin had gone _ what almost anyone would have done, finding my house on a bitterly cold night, and for that I was extremely _.