Article: Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts to keep afloat during floods. They also have documented how ant colonies choose their next queen--the female whose job is to produce eggs rather than seek food for others. New technology is helping to improve researchers' understanding of the insects. But there is still a lot to be learned. Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide. David Hu who is a mechanical engineer with the Georgia Institute of Technology, also known as Georgia Tech, says, "If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they're very, very good at maintaining this network." David Hu and other Georgia Tech researchers want to study ants and the secret of their engineering. They freeze ant rafts and then look at them with the help of computed technology, or CT, images. The pictures show that larger ants serve in central positions to which smaller ants hold. The larger ants form pockets of air that keep the insects afloat. Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal. Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen. Question: Why did the larger ants serve in central positions in their ant rafts? Yes or no, is the answer "To save their ant societies."?
No

Article: People who breathe infected air from a TB patient can become infected with the tuberculosis bacteria . However, most people with active tuberculosis do not expel (,)very many TB bacteria. So, the spread of the disease usually does not happen unless a person spends a large amount of time with a TB patient. Those most at risk are family members, friends and people who live or work closely with a patient. Tuberculosis can attack any part of the body. However, the lungs are the most common targets of the bacteria. People with the disease show several signs. They may expel air from the lungs suddenly with an explosive noise. This kind of cough continues for a long period of time. People with a more severe case of tuberculosis also may cough up blood. People with the disease often have high body temperatures. They suffer what are called night sweats, during which their bodies release large amounts of water through the skin. TB victims also are tired all the time. They are not interested in eating. So their bodies lose weight. One thing that is especially dangerous about TB is that people with moderate signs of the disease may not know they have had it. They may spread the disease to others without even knowing it. So, it is very important for people to get tested for tuberculosis. Question: Why may some TB patients spread the disease to others without even knowing it? Yes or no, is the answer "Because these patients' signs of the disease are too weak to be noticed."?
No

Q: Article: After lunch,I walked back home. I was just to cross the street when I heard the sound of a coin dropping. It wasn't much but,as I turned, my eyes caught the heads of several other people turning too. A woman had dropped what appeared to be a dime. The tinkling sound of a coin dropping on pavement is an attention-getter.It Can be nothing more than a penny.Whatever the coin is,no one ignores the sound of it.It got me thinking about sounds again.We are surrounded by so many sounds that attract the most attention. People in New York City seldom turn to look when a fire engine,a police car or an ambulance comes screaming along the street.When I'm in New York,I'm a New Yorker.I don't turn either.Like the natives,I hardly hear a siren there. However,at home in my little town in Connecticut,it's different.The distant sound of a police car, all emergency vehicle or a fire siren brings me to my feet if I'm seated and brings me to the window if I'm in bed.It's the quietest sounds that have most effect on us.not the loudest.In the middle of the night, I can hear a dripping tap a hundred yards away thigh three closed doors.I've been hearing little creaking noises and sounds which my imaginnation turns into footsteps in the middle of the night for twenty-five years in our house.How come I never hear those sounds in the daytime? I'm quite clear in my mind what the good sounds are and what the bad sounds are,I've turned against whistling,for instance:I used to think of it as the mark of a happy worker but lately I've been associating the whistler with a nervous person making unconscious noises.The tapping,tapping,tapping of my typewriter as the keys hit the paper is a lovely sound to me.I often like the sound of what I write better than the looks of it. Question: What kind of sound does the author find pleasant? Yes or no, is the answer "Tapping sound of his typewriter."?
A: No

Q: Article: Mayor Boris Johnson Monday outlined plans to make London "the cleanest, greenest city on Earth" by the 2012 Olympics and called for commitments from other world cities at a climate change conference, leaders of the world' s 40 largest cities are meeting in Seoul this week for a summit on combating global warming -- the third to be held since 2005. "What we should do in Seoul is agree that we will stop the endless addiction of mankind to the internal combustion engine ," said Johnson. He said at a press conference the world's cities consume 75 percent of the world's energy and produce 80 percent of the emissions which cause climate change. "The problem of our planet is an urban problem," Johnson said. He said the British capital wants to use the Olympics "to drive the greening and the improvement of our city" and noted that London is committed to reduce carbon dioxide emissions by 60 percent by 2025. Johnson said the key measure was being taken to solve problems relating to housing and commercial buildings, which accounted for 70 percent of carbon dioxide emissions in London. This involved retrofitting -- installing lagging -- in large numbers of public buildings. Johnson proclaimed himself a "passionate cyclist" and said he would push ahead with cycle superhighways around London. London's air quality problem, he said, was caused by vehicle emissions from 8,300 worn and used diesel buses, which could be replaced by low-carbon vehicles. In addition, there were also 32,000 taxis running on diesel fuel, which could be replaced by electric vehicles. Johnson said there would be a few programs in the next few years to produce a "cleaner, greener" bus for the city. "The age of the diesel bus has got to be over in London." Question: If the passage was continually written, the following might be _ . Yes or no, is the answer "measures to end the age of the diesel bus"?
A: Yes