Read the following article and select the best answer. Article: A super drug that could remove Alzheimer's ,heart disease and diabetes and help people live to 100 is being developed by scientists. Their research is based on the identification of three genes that help prolong lives and prevent diseases which occur in old age. Medically controlling the proteins made by the " longevity genes" will allow millions to live longer, predicts Dr Nir Barzilai. Those whose DNA strongly features the three genes are 80 percent less likely to develop Alzheimer's. The genes also fight against the deadly impact of smoking, poor diet, obesity and lack of exercise. Already, several laboratories are working on a pill to imitate the benefits of the genes and Dr Barzilai thinks it could be tested within three years. The pill could remove some diseases that damage old age. " The advantage of finding a gene that involves longevity is that we can develop a drug that will imitate exactly what this gene is doing," he said. Of the three longevity genes, two genes increase the production of so-called good cholesterol , which reduces the risk of heart disease. The third prevents diabetes. They were discovered by Dr Barzilai's team while studying the DNA of 500 Ashkenazi Jews with an average age of 100. The chances of living that long are one in 10,000 but the group, which shared relatively few common ancestors, was 20 times more likely to hit the entury. Dr Barzilai said: " 30 percent of them were obese or overweight and 30 percent smoked two acks of cigarettes a day for more than 40 years, however they can live to 100." But Andrew Ketteringham of the Alzheimer's Society said: "Alzheimer's disease, a most common disease, is likely to be caused by a combination of genetic disosition , lifestyles and life events. Many genes are probably involved. Question: Some people are able to live to 100 years because of _ . - a magical medicine - three special genes - good living habits - longevity proteins
three special genes

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Read the following article and select the best answer. Article: School children are using mobile phone applications to do their homework, which seem to beincreasing during summer vacations. But instead of blaming students for their behavior, we should say noto too much homework. This is important because by using mobile phone applications to do theirhomework, students don't add much to their knowledge, says an article in Guangzhou-based YangchengEvening News. Excerpts : Using mobile phone applications to do homework is no different from copying from someone else'swork. This is the opinion of a vast majority of teachers. Students who seek cell phone apps help to do theirhomework will pay dearly during major exams when they cannot seek the help of such applications, theteachers say. The heavy load of homework Chinese students are burdened with, said to be the heaviest in the world,has led to the popularity of these applications. Senior high school students in China rarely go to bed before 11 pm. A report in Shanghai published in2013 showed that students in the city on average spend 28.2 hours in class every week, the 9th highestamong 65 countries and regions surveyed. Also, they spend an average of 13.8 hours a week doinghomework, most in the world. There is no association between the amount of homework one does and the amount of knowledge onegathers. In fact, a research by Australian experts shows that the result is exactly the opposite: the morehours students spend doing homework, the less effective they will be in gaining knowledge. The United States is one of the countries where students do little homework, but that has not damagedthe country's academic status in the world. So, it's time Chinese schools understood this fact and freed students of the unnecessary burden ofhomework. Question: What's the writer's attitude toward the students' using mobile phone applications to do theirhomework? - Supporting - Understanding - Scolding - Praising
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Understanding

Read the following article and select the best answer. Article: People in several American states may be surprised to see cars on city streets without a driver. Experimental driverless vehicles now are legal in Florida, Nevada and California. They are pointing the way to a future that is not far down the road. The high-tech company Google has a number of self-driving cars, which had covered 480,000 kilometers by August. Volvo is among the companies doing road tests and says it plans to sell driverless cars by 2020. In September, California Governor Jerry Brown signed an act to allow autonomous vehicles on the roads of his state. " Today we're looking at science fiction becoming tomorrow's reality-the driverless car. " The technology for these cars includes cameras, radar and motion sensors. The systems have been improved through competitions sponsored by the U. S. government agency DARPA. Engineer Richard Mason of the Rand Corporation helped design driverless vehicles for DARPA challenge races. Cars have become much more fuel-efficient, and new electronic features are' making Hondas safer, said Angie Nucci of Honda America. " A camera on the passenger-side mirror actually engaged on your guiding screen so you can safely change lanes. " Other safety features include warning systems on the front and the sides of the cars. These systems help drivers , but don't replace them. Curator Leslie Kendall of the Petersen Automotive Museum said autonomous cars will make the high ways safer. "By taking out drivers, you also remove most risks of an accident," Kendall said. He said consumers, however, may be unwilling to lose control. "It may take them time to come to realize that the technology is indeed reliable, but it will have to prove itself first. " Mason said the technology already works and the biggest challenge now is getting down the cost for driverless vehicles from hundreds of thousands of dollars to something more affordable. He said this will happen as the technology is improved. ks5u Question: We learn that Governor of California Jerry Brown _ . - helped design self-driving cars. - supports self-driving cars on roads. - considers self-driving cars science fiction. - improved the self-driving car systems.
supports self-driving cars on roads.