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In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
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Article: Since Edmund Hillary and Tenzing Norgay climbed Mount Everest, Mount Qomolangma's peak is no longer a lonely place and is turning into a trash heap. So far, more than 350 climbers have successfully reached the peak. And they have complained about waiting for hours in the bottlenecks on the way to the peak, a situation that isn't just uncomfortable -- it's cold and windy up there -- but downright dangerous. If bad weather strikes, climbers can and do die. As a matter of fact, the dangerous crowds aren't the only problem on Qomolangma. All those climbers need to bring a lot of _ --and much of them ends up being left on the mountain, sometimes even the peak itself. Mount Qomolangma is becoming the world's largest dump. Here's mountaineer Mark Jenkins writing in National Geographic about the state of Qomolangma: "The two standard routes, the Northeast Ridge and the Southeast Ridge, are disgustingly polluted with oxygen cans and torn tents everywhere." But the good news is that some mountaineers are taking it upon themselves to clean up Qomolangma. Mountianeer Paul Thelen and his friend Eberhard Schaaf are part of the annual Eco Everest Expedition, which has been cleaning up rubbish from base camps to the peak since 2008. So far they've collected over 13 tons of garbage. Some of that rubbish is even being used for a higher purpose. As part of the Mount Everest 8844 Art Project, a group of 15 artists from Nepal collected 1.5 tons of garbage brought down the mountain by climbers. They've transformed the cans and oxygen tanks--and in one case, part of the remains of a helicopter--into 74 pieces of art that have already gone on exhibition in Nepal's capital. Part of the profit from sales will go to the Everest Peakers Association, which has helped collect tons of rubbish on the slopes of the mountain.
Answer: created works of art using rubbish from Qomolangma
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The group of 15 Nepali artists _ .

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Article: Some people say that the best way to reduce the size of your waist is to do stomach exercise. Many people believe that when specific muscles are exercised, the fatty tissues in the immediate area are burned up. The truth is that exercise burns fat from all over the body and not from one specific area. Of course, if you reduce the fat throughout your body, you will certainly see results around your waist too. Some people believe that you need to exercise twice a week in order to keep a sufficient level of physical fitness. However, studies directed by American scientists show that unexercised muscles lose their strength very quickly. Within 48 to 72 hours, you must use the muscles again to reestablish the good physical effects. And what does that mean to you? American scientists concluded that while daily exercise is most helpful, exercising every other day or three days a week will keep a sufficient level of physical fitness. Is it true that you burn more calories running one mile than walking the same distance? The answer is no. The truth is that you use the same amount of energy whether you walk or run the mile, since in both cases you are moving the same weight the same distance. The speed does not matter. Of course, if you run rather than walk for 30 minutes, you will cover more distance, and therefore burn more calories. If your breathing doesn't return to normal within 5 minutes after you finish exercising, you have exercised too much. Five minutes or so after exercising, your breathing should be normal, your heart shouldn't be beating loudly, and you shouldn't be tired.
Answer: run fast for 30 minutes
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If you want to reduce the fat around your waist, you should _ .

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Article: Fashion refers to the styles of dress that are currently popular. Fashion goes beyond just clothes, though. It's important for some people to wear only the latest fashions and styles. For others, though, keeping up with trends isn't that important. The one thing that stays the same with fashion is this: it always changes! In the 1960s and 1970s, hippies made bell-bottomed blue jeans popular. In the 1980s, Michael Jackson made parachute pants all the fashion. Now try to find these items in today's clothing stores! Why do fashions change? The answer is probably as simple as the fact that people change. Over time, the new replaces the old. People are influenced greatly by popular culture, including athletes, musicians, movie stars, as well as popular films, televisions shows, books and music. We are also influenced by the fashion industry's advertising. The stars of popular culture are always searching for a new angle to maintain their popularity. Often these new angles come in the form of new clothing or hairstyles. When people see these new styles, they often want to imitate their favorite stars. To do so, they seek out the latest fashions to make themselves look like the people they want to imitate. In this way, fashions evolve and change over time. For years, clothes have been used to separate people into groups. Even today, brand-name clothing that is more expensive than other types of clothing can be used by some people to distinguish themselves from others. Unfortunately, this can often have the effect of distancing certain groups from others. Don't forget that it's always OK to develop your own sense of style that is unique and separate from what the fashion world determines! Stay true to yourself and let your personality -- not your clothes -- speak for who you are.
Answer: advertisements change rapidly
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Fashion change mainly because _ .