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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Question: Article: In December of l 992.I was a happy husband and father of two young children.A month later,I was diagnosed with Acute Lymphoblastic Leukemia . After two years of chemo that helped control the disease,my body was weak and lifeless.I felt as if I were a puppet who needed help to lift his arms or hold up his head. I began to run.After six months my strength had come back.On one of my runs,one where I felt I could run forever,I decided I was going to try to run a marathon. After telling my Dad about my plan,he told me of a program that trains people to run a marathon,while raising funds for Leukemia research at the same time.So that summer,through the Leukemia Society's Team in Training program,I started to train for the Marine Corps Marathon.During mile after mile of uncertainty,the day finally came to run the marathon. On October 27,1996,at 8 A.M.,along with l9,000 other brave souls I started on a 26.2-mile journey that I will never forget. I first saw my wife Patty at the six-mile mark . She seemed happy that I was still looking as if I knew what I was doing,and having a good time doing it.At Mile l7,my mind was going back to those two horrible years that tried to bring my family and me down.I saw her again.The concern in her face told me she knew I was starting to struggle.I felt as if we were thinking the same,nine more miles and these last few years will be behind us. That thought alone pulled me forward.Mile 22,23,slowing but going,24,25,then there it was.The Iwo Jima War Memorial.I have seen nothing so grand and inspiring in my life.Three hours and forty-one minutes after I started,I crossed what I think has to be the most fitting finish line in all of road racing! That night the Leukemia Society gave me a pin at a post-race party that simply says,"Leukemia 26.2". If God wills,my cancer may once again take away my hair and my strength,maybe even my life.But it can never take away my pin,or the fact that I am a marathoner .
Answer: he believed he was able to take the challenge

Answer: The writer decided to run a marathon because _ .

Question: Article: We always read reports about costs of oil going up and we will think this is our most valuable material. However, water is the most valuable resource . People in the Middle East are more worried about this than oil. Maybe the next war will be about water. In the future, to control the quality and quantity , you will use different water for different usages. The water used to wash your car, water your flowers or wash your clothes doesn't need to be as clean as the water you drink. One in five people live in countries without enough fresh water and in 25 years, the number is believed to be one in every three people. Our world population is increasing. What do you suppose this will suggest for us in the future? Population control? Traditional management of the water industry has been out of date since the 1990s. When technologies develop so rapidly in the world, we have loads of information for technologies in the business world, but in the water industry we don't have any. Britain and France have already taken measures to successfully improve their water industries. All the water services in Britain have been provided by private companies since 1991. Since then, improvement has been made in the rules for their water quality and pricing. What can you do now for the future? Using water more efficiently in your house can make a great difference not only to the world but to your money. Even if you don't have to pay much now, you will when you start to pay big prices for different water usages.
Answer: the world population is growing up.

Answer: Water shortage is getting more serious because _ .

Question: Article: An invisible smile Mr. Dawson was an old grouch , and everyone in town knew it. Kids knew not to go into his yard to pick a delicious apple, even off the ground, because old Dawson, they said, would come after you with his ball bullet gun. One Friday, 12-year-old Janet was going to stay all night with her friend Amy. They had to walk by Dawson's house on the way to Amy's house, but as they got close Janet saw him sitting on his front porch and suggested they cross over to the other side of the street. Like most of the children, she was scared of the old man because of the stories she'd heard about him. Amy said not to worry, Mr. Dawson wouldn't hurt anyone. When they got close enough, Dawson looked up with his usual frown, but when he saw it was Amy, a broad smile changed his entire face as he said, "Hello Miss Amy. I see you've got a little friend with you today." Amy smiled back and told him Janet was staying overnight and they were going to listen to music and play games. Dawson told them that sounded fun, and offered them each a fresh picked apple off his tree. When they got out of Dawson on earshot, Janet asked Amy, "Everyone says he's the meanest man in town. How come was he so nice to us?" Amy explained that when she first started walking past his house he wasn't very friendly and she was afraid of him, but she pretended he was wearing an invisible smile and so she always smiled back at him. It took a while, but one day he half-smiled back at her. After some more time, he started smiling real smiles and then started talking to her. "An invisible smile?" questioned Janet. "Yes," answered Amy, "my grandma told me that if I pretended I wasn't afraid and pretended he was smiling an invisible smile at me and I smiled back at him, that sooner or later he would really smile. Grandma says smiles are contagious." However, it's so easy to get caught up in everyday life that we forget how simple it can be to bring cheer to ourselves and others. If we remember what Amy's grandma said, that everyone wears an invisible smile, we too will find that most people can't resist our smile after a while.
Answer: they were afraid of being punished by Mr. Dawson

Answer:
Many kids didn't dare to go into Mr. Dawson's yard to pick a sweet apple because _ .