Please answer this: Write a multi-choice question for the following article: Article: Like distance runners on a measured course,all of us will move through time in a roughly predictable pattern. In the first stage of our lives,we develop and grow, reaching toward the top of physical vitality . After we grow up,however, the body begins a process of gradually wearing out. A new awareness of physical fitness may help lengthen our years of health and vitality,yet nothing we do will work to stop the unavoidable force of aging. Most of the changes of aging take place deep inside the body.The lungs become less able to take in oxygen.Powerful muscles gradually lose their strength.The heart loses power and pumps less blood.Bones grow easier to break. Finally, we meet a stress,a stress that is greater than our physical resistance.Often,it is only a minor accident or chance infection(a disease caused by virus),but this time, _ brings life to an end. In 1932,a classic experiment nearly doubled the lifetime of rats,simply by cutting back the calories in their diet The reason for the effect was then unknown. Today, at the University of California at Berkley, Dr.Paul Seagle has also greatly lengthened the normal lifetime of rats.The result was achieved through a special protein limited diet,which had a great effect on the chemistry of the brain.Seagle showed that within the brain,specific chemicals control many of the signals that influence aging.By changing that chemical balance,the clock of aging can be reset. For the first time, the mystery of why we age is being seriously challenged.Scientists in many fields are now making striking and far-reaching discoveries. An average lifetime lasts 75 years,yet in each of us lies a potential for a longer life.If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years.
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Answer: Question: What is probably the best title for the article?Options:A Two Great ExperimentsB The Mystery of Human LifeC The Breakthrough in the Study of AgingD Ways to lengthen Human LifeAnswer:C

Please answer this: Write a multi-choice question for the following article: Article: Li Denghai, with his muddy boots and tanned face, may not look like he is one of China's famous agricultural pioneers. But the 61-year-old man from Shandong Province has made scientific breakthroughs , which made great contributions to China's food security . His main work has been in achieving the higher output of corn production. Li, who holds the world record for the highest output of summer corn, once says, "Corn has a life; it sings and dances. If you listen clearly, it can speak to you." He started his research in 1969 when he was 20 and just dropped out of a high school. He then read an article which pointed that corn output per mu in the USA was six times higher than that in China. He was shocked and set out to work on just a small piece of land _ to see if he could increase the output. He often went to the field with a flashlight late at night, if he had been away during the day. By careful nurturing he managed to double the output. Li Denghai was awarded the "China Award for Significant Contribution to the Maize Industry" in 2005, and the same year the company named after his own name came into the market on the Shenzhen Stock Exchange. Li, however, is never happier than when he is in the middle of his cornfields. "I can forget my tiredness when talking to my corns," he says.
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Answer: Question: When Li Denghai began the study of corn, _ .Options:A he just graduated from an ordinary high schoolB he was shocked that the corn output in China was so lowC he was only in his thirtiesD he wasn't really fond of his workAnswer:B

Please answer this: Write a multi-choice question for the following article: Article: It's easy to see how to help others, but what about those whose needs aren't so obvious? This story may have happened a while back, but it was a lesson which has stayed with me and helped me ever since. It was Thanksgiving and I was volunteering with my parents at a shelter for the poor. We stood behind the counter dishing out hot food to whoever came in. most of our dinners looked like they had been having hard times, their clothes old, worn and dry. In short, they looked poor! Then, a man came in, who looked anything but poor. He was well dressed, wearing an expensive suit. I wondered what he was doing there and my jaw dropped in amazement when he joined the line for food. The closer he came to my service station, the more I muttered. What was this man doing? I wanted to know. Surely he wasn't gong to take food. Then my mother quietly took me to one side. She said, "You have assumed that the needs of the people who come here must be purely physical: hunger, inadequate shelter and needs are emotional? What if he needs comfort, friends, or just to be among other human beings?" her words hit me like a ton of bricks! I felt like I should apologize to the man, but I didn't. About a week later the shelter received a large donation from an anonymous source. I can't help but wonder if it came from that man. Now, whether I meet others, I remember my mother's words and try to send kindness and blessings to them, regardless of how they look. Needs aren't always visible. But kindness always makes a difference.
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Question: The task of the author at the shelter was to _ .Options:A decide whether dinners looked poorB learn life experience thereC serve hot food to the poorD help parents order dishesAnswer:C