Article: Elephants have impressed us for centuries. They are big, clever, and sociable. But what if someone told you that they may also hold the key to fighting cancer? People have been wondering why elephants do not develop cancer, even though they have life spans that are similar to humans, living for around 50 to 70 years. Now scientists believe they know why. A team at the University of Chicago, Us has found that elephants carry a large number of genes that stop tumors from developing. To be precise, they found 20 copies of an anti-tumor gene called TP 53 in elephants. Most other species, humans included, only carry one copy. According to the research, which was recently published on the online science network BioRxiv, the extra copies of the gene improved the animal's sensitivity to DNA damage. This lets the cells quickly kill themselves when damaged before they can form deadly tumors. "An increased risk of developing cancer has stood in the way of the evolution of large body sizes in many animals," study author Dr Vincent Lynch told The Guardian. If every living cell has the same chance of becoming cancerous, large creatures with long life spans like whales and elephants should have a greater risk of developing cancer than humans and mice do. But across species, the risk of cancer does not show a connection with body mass. _ was found by Oxford University scientist Richard Peto in the 1970s and later named "Peto's paradox". Evolutionary biologists believe it results from larger animals using protection that many smaller do not, In the elephant's case, the making of TP53 is nature's way of keeping this species alive. The study also found that when the same genes were brought to life in mice, they had the same cancer resistance as elephants. This means researchers could use the discovery to develop new treatments that can help stop cancers from spreading or even developing in the first place. "Nature has already figured out how to prevent cancer," said Joshua Schiffman, an oncologist at the School of Medicine,... Question: Why are elephants unlikely to develop cancer? Yes or no, is the answer "They carry many genes that keep tumors from developing"?
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Article: I was in Houston a few weeks ago,and needed to be back home in Austin by midmorning the next day.Though I usually left in the evening,for some reason last time I had to choose to set off after midnight. I was on my way back to Austin when I realized I left an important file,and knew I had to return to get it.I took the first exit I could,but when I rounded the corner,an 18-wheeler was stopped dead in the exit lane.I swerved to avoid it,and then I realized that there was something wrong with my car.So I pulled into a small parking lot and unsurprisingly found the area deserted at 3:15am.I've lived in urban areas most of my life.I'm fairly street-wise and don't become frightened easily,but I knew I was in a pretty tough neighborhood. There was no one in Houston to pick me up.I immediately locked the doors and picked up my phone to call a tow truck.Soon a young man knocked on my driver's side window and asked if he could help me.Judging from his appearance,he was far from a mad man,but I knew he was far more likely to rob than help me.So I lied to him.After a while,he asked again,but this time I politely refused and told him the tow truck was due any minute.He finally said,"Madam,you need help.A tow truck in Houston will arrive anywhere between 45minutes and approximately never (which I knew was true),and you aren't going anywhere until you change your flat tire." After considering thoroughly,I got out.He looked surprised,but got right to work.He changed the tire,returned the seat to its place and said,"Thank you for letting me help you.You gave me a chance when most people would never open the door to someone like me.Would it be okay if I gave you a hug?"When I recovered,I gave him a giant hug.I left with a new tire and a renewed faith in human nature. Question: Which of the following might be the best title for the text? Yes or no, is the answer "Help in the Dead of Night"?
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Article: My Best Enemy Once again, I was in a new school. So was a girl in my class named Lisa. That's where the similarities ended. I was tall and she was small. My thick black hair had been recently cut short into an untidy style. Her natural blonde hair flowed to her waist and looked great. I was 12 and one of the oldest in the class while she was 11 and the youngest. I was awkward and shy. She wasn't. I couldn't stand her, considering her my enemy. But she liked me and wanted to be friends. One day, she invited me over and I said yes--I was too shocked to answer any other way. My family had moved six times in six years, and I had never managed to develop any friendships. But this girl who wore the latest fashions wanted me to go home with her after school. She lived in a fun part of town that had two pizza places, an all-night bookstore, a movie theater and a park. As we walked from the school bus stop through her neighborhood, I tried to guess which house might be hers. Was it the white one with the perfect lawn or the three-story house with a front porch? I got very surprised when she led me into an old apartment building. She lived on the fourth floor in a two-room place with her mother,her stepfather, her two brothers and her sister. When we got into the room she shared with her sister, she took out a big case of Babies, which was my next surprise. I had never played with them. We sat on the floor,laughing as we made up crazy stories about the Babies. We found out that we both wanted to be writers when we were older and both had wild imaginations. We had a great day that afternoon. Lisa was loved by the whole neighborhood. The bookstore owners lent her fashion magazines; the movie theater gave her free tickets... Soon I was included in her magic world. We slept over at each other's houses and spent every free moment together. Lisa, my first real friend since childhood, helped me get through the rough year of early adolescence and taught me an amazing and very surprising thing about making friends: that your... Question: One day Lisa invited the writer _ . Yes or no, is the answer "to go to her home"?
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