TASK DEFINITION: In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
PROBLEM: Article: While the rest of his family was happily feasting during Spring Festival, Zu Xinming, a Senior 2 student in Shaanxi province, was frowning. "Every time my s leave after dinner, almost half of the dishes are unfinished," he said, and we throw away a lot of food. Nowadays in China, food waste is a widespread problem. Each year, Chinese people throw away the equivalent of about 50 million tons of grain, an amount which could feed 200 million people, according to Xinhua News Agency. One reason is that people are unaware of the issue. "Some of my friends don't care at all when they can't finish the food on their plates," said Zu, "and they even throw it away if they don't like the taste." Gong Tao, an official from the Communist Youth League of China Committee of Central South University in Hunan province, is worried about the decreasing awareness of food waste on his campus in recent years. "Students don't know how much hard work others go through in order to provide their food," Gao told China Education Daily. One deeper factor is the Chinese cultural value of "face". In a Chinese banquet setting, the host feels great shame when guests' plates are empty. "Serving lots of food is the Chinese way of showing respect to guests and displaying generosity," Yu Changjiang, a sociologist at Peking University, told Xinhua. Huge public spending on government banquets is also worsening the situation. Government banquets at the taxpayer's expense have become "a major source of waste", commented People's Daily. The good news is that people are already beginning to take action. On Jan 16, 10 restaurants with 749 outlets in Beijing joined an "eating up" campaign promoted by Xu Xiake, deputy director of China Land and Resources News. These restaurants have begun serving half-sized meals and small dishes. So, how can you help reduce food waste? Discuss with your family regularly about your food preferences and how much you want to eat. Eat all of the food on your plate and in your bowl. And each week, help your parents clean the fridge so that all of the food gets eaten before it goes to waste.
Answer: In Chinese culture, people show their welcome by serving lots of food.

SOLUTION: According to the passage, which of the following is true?

PROBLEM: Article: It's not easy growing up. Growing up can be a real "pain" for some of us. Sometimes we feel trapped, sometimes we feel sad, sometimes we are fearful, and sometimes we just don't understand why we can't stay young forever. But we should take a look back on all the hardships in life with a positive attitude and learn from them. We must overcome every obstacle one small step at a time. We should realize that all of our growing pains actually turn into growing gains! Throughout our lives we are going to face many challenges and pains, but we should never let these _ keep us from following our dreams. We must overcome every obstacle one small step at a time. As a young girl, my parents forced me to do so many things that I didn't like. They made me learn to play the violin and then the piano. At that time I hated music and I also hated them. But looking back now, I am so glad that my parents encouraged me to take music lessons. Music hasenriched my life in so many ways. I now realize that my parents and teachers wanted me to have a better life than they did themselves. We are all going to experience growing pains, but they are just part of our life. They might seem so huge at the time, but we must be strong. Think about how we would feel if we had no challenges and lived a life like that. Life would be really boring and meaningless. The future is ours! A little hard work and sweat never hurt anyone! If we realize that these pains are just smallbumps on our road to success, we will realize that our growing pains are actually growing gains!
Answer: She is grateful

SOLUTION: How does the author now feel when remembering what her parents did for her in the past?

PROBLEM: Article: Researchers at San Diego Zoo have been studying what has been described as the "secret language" of elephants. They have been monitoring communications between animals that cannot be heard by human ears. The elephant's call will be familiar to most people, but the animals also give out growls . Their growls, however, are only partly audible ; two-thirds of the call is at frequencies that are too low to be picked up by our hearing. To learn more about the inaudible part of the growl, the team attached (......) a microphone sensitive to these low frequencies and a GPS tracking system to eight of the zoo's female elephants. The researchers could then relate the noises the animals were making to what they were doing. Matt Anderson, who led the project, told BBC News, "We're excited to learn how they interact and contact with one another." The team has already learned that pregnant females use this low frequency communication to announce to the rest of their long gestation of over two years, in the last 12 days we see the low part of the growl, which we can't hear. This we believe is to announce to the rest of the herd that the baby is upcoming," said Dr Anderson. The researchers believe that this also warns the elephants to look out for coming danger. "You may think that a baby calf of about 300 pounds would not be as open to predation as other species," he says. "But packs of hyenas are a big threat in the wild." Female elephants are only in season for around four days every four years and these calls can be heard by males more than two miles away.
Answer: Because it can't be heard by human ears.

SOLUTION:
Why some elephants' call is called "secret language"?