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.
--------
Question: Article: It's not easy to find a person with the qualities it takes to be a hero. I didn't really understand the meaning of the word "hero" until my third year in the college. If you saw her, you wouldn't think she really looks the part, but she is stronger than Superman could ever be. Her name is Sandra Keierleber. I first met her at volleyball tryouts , but didn't notice anything special at first. As the week passed, however, she showed she had more heart than anyone. She stood out because she never gave up, no matter what. Sandra isn't the tallest or the fastest --- in fact, this was her first time playing volleyball and it showed--- but that didn't stop her. She was always the first to arrive and the last to leave. By the end of tryouts she had found a place in everyone's heart. When the name list for new members was put up, we all waited nervously as she checked. When she stood at the door and smiled happily, all we could do was cheer. After Sandra made the team, she worked even harder to improve her game. When she asked for help, we gladly taught her. She also became our fan, attending almost every school game and even joining us in the city games. We all like her, because she never thinks about doing things the easy way, or loses that smile. Because of her great efforts, she makes herself a true hero--- and my hero, too.
Answer: Common

Answer: What did the writer think of Sandra Keierleber at the beginning?

Question: Article: Even before my father left us, my mother had to go back to work to support our family.Once I came out of the kitchen, complaining, "Mom, I can't peel potatoes.I have only one hand." Mom never looked up from sewing."You get yourself into the kitchen and peel those potatoes," she told me."And don't ever use that as an excuse for anything again!" In the second grade, our teacher lined up my class on the playground and had each of us race across the monkey bars, swinging from one high steel bar to the next.When it was my turn, I shook my head.Some kids behind me laughed, and I went home crying. That night I told Mom about it.She hugged me, and I saw her "we'll see about that" look.The next afternoon, she took me back to school.At the deserted playground, Mom looked carefully at the bars. "Now, pull up with your right arm," she advised.She stood by as I struggled to lift myself with my right hand until I could hook the bar with my other arm.Day after day we practiced, and she praised me for every rung I reached.I'd never forget the next time, crossing the rungs.I looked down at the kids who were standing with their mouths open. One night, after a dance at my new junior school, I lay in bed sobbing.I could hear Mom come into my room."Mom," I said, weeping, "none of the girls would dance with me." For a long time, I didn't hear anything.Then she said, "Oh, honey, someday you'll be beating those boys off with a bat." Her voice was soft and weak.I glanced at her to see tears running down her cheeks.Then I knew how much she suffered on my behalf.She had never let me see her tears.
Answer: Cold.

Answer: Which of the following expressions can be used most suitably to describe Mom's attitude when she made the child peel potatoes?

Question: Article: Life on earth depends on water, and there is no substitute for it. The current assumption is that our basic needs for water--whether for drinking, agriculture, industry or the raising of fish--will always have to be met. Given this premise , there are two basic routes we can go; more equal access to water or better engineering solutions. Look at the engineering solutions first. A lot of my research concentrates on what happens to wetlands when you build dams in river basins, particularly in Africa. The ecology of such areas is almost entirely driven by the seasonal changes of the river--the pulse of the water. And the fact is that if you build a dam, you generally spoil the downstream ecology. In the past, such problems have been hidden by a lack of information. But in the near future, governments will have no excuses for their ignorance. The engineers' ability to control water flows has created new kinds of unpredictability, too. Dams in Africa have meant fewer fish, less grazing and less floodplain agriculture, none of which were expected. And there average economic life is assumed to be thirty years. Dams don't exist forever, but what will replace them is not clear. The challenge for the future is to find new means of controlling water. Although GM technology will allow us to breed better dry-land crops, there is no market for companies to develop crops suitable for the micro-climates of the Sahel and elsewhere in Africa. Who is going to pay for research on locally appropriate crops in the Third World?
Answer: The engineering solutions to water resource and their limitation.

Answer:
What's the main idea of this passage?