Q: Read the following article and answer the question. Article: Old Fossils Scientists have found what they think is probably the oldest fossil on Earth, a remnant of life from 3.7 billion years ago when Earth's skies were orange and its oceans green. In a newly melted part of Greenland, Australian scientists found the leftover structure from a community of microbes that lived on an ancient seafloor. Based on their analysis of the fossils, the researchers determined that they are 220 million years older than those discovered in Western Australia, which were 3.48 billion years old. The discovery shows life may have formed quicker and more easily than once thought, about half a billion years after Earth formed. And that may also give hope for life forming elsewhere, such as Mars, said study co-author Martin VanKranendonk of the University of New South Wales and director of the Australian Center for Astrobiology. "It gives us an idea how our planet evolved and how life gained a foothold," VanKranendonk said. Scientists had thought it would take at least half a billion years for life to form after the molten Earth started to cool a bit, but this shows it could have happened quicker, he said. That's because the newly found fossil is far too complex to have developed soon after the planet's first life forms, he said. In an outcrop of rocks that used to be covered with ice and snow which melted after an exceptionally warm spring, the Australian team found stromatolites , which are layered structures that are often produced by a community of microbes. The stromatolites were about 1 to 4 centimeters high. "It is like the house left behind made by the microbes," VanKranendonk said. "Scientists used the layers of ash from volcanoes and tiny zircon with uranium and estimated that they date back to 3.7 billion years ago." The dating seems about right, said Abigail Allwood, a NASA astrobiologist who found the previous oldest fossil, from 3.48 billion years ago, in Australia. But Allwood said she is not completely convinced that what VanKranendonk's team found once was alive. She... Question: What is Abigail Allwood's attitude towards the newly found fossil? Answer: | OPTIONS:
- Neutral.
- Sceptical.
- Objective.
- Supportive.
A: Sceptical.

Q: Read the following article and answer the question. Article: Charlie studied in a famous college for four years. He studied hard and did well in all his subjects. He hoped to become a good teacher. This year he left the college and began to work in a middle school. He likes his students and is strict with them. He does his best to make his classes lively and interesting. One day he carefully explained a chemical reaction to the students of Grade 2 in the chemistry lab. "Be careful, everyone," he said loudly. "Before I make the experiment,there're twenty five atoms of carbon ,but after I finish it, there're twenty four atoms of carbon left!" He stopped to watch the classroom and hoped his students would go on explaining it. But the young men looked at each other and nobody answered him. He had to ask, "What happens? What makes the atom lost?" The classroom was very quiet and none of the students looked at their teacher. "Who can tell us where it has gone?" Suddenly a soft voice came from the back row, "We did not see anybody leave the lab!" Question: The students couldn't answer Charlie's questions because _ . Answer: | OPTIONS:
- none of them had seen the atoms
- they didn't understand their teacher
- the chemical reaction was too complicated
- they all wanted to drop the subject
A: they didn't understand their teacher

Q: Read the following article and answer the question. Article: Having good social relationships -- friends, marriage or children -- may be every bit as important to a healthy life as quitting smoking, losing weight or taking certain medicines. U. S. researchers reported on Tuesday. People with strong social relationships were SO percent less likely to die early than people without such support, the team at Brigham Young University in Utah found. They suggest that the government look at ways to help people keep social relationships as a way of keeping the population healthy. "A lack of social relationships was equal to smoking up to 15 cigarettes a day," psychologist Julianne Holt-Lunstad, who led the study, said in a telephone interview. Her team conducted a study that examined social relationships and their effects on health. They looked at 148 studies that covered more than 308,000 people, published in the Public Library of Science journal PLoS Medicine at www.plosmedicine.org. Having low levels of social relationships was equal to being an alcoholic, was more harmful than not exercising and was twice as harmful as obesity. Social relationships had a bigger effect on early death than getting an injection to prevent pneumonia ,than taking drugs for high blood pressure and far more important than living in air pollution, they found. "I certainly don't want to _ these other risk factors because of course they are very important," Holt-Lunstad said. We need to start taking social relationships just as seriously. " But Holt-Lundstad said there was some evidence that assigning caretakers does not help improve people's health. "Naturally occurring relationships may be different than the support received from someone who is hired for that purpose." she said. Question: What conclusion can we draw from the text? Answer: | OPTIONS:
- The support from hired caretakers is more natural.
- The love from our family members has better effect.
- Air pollution does more harm to people than poor social relationships.
- Poor social relationships are the biggest reason for people's early death.
A: The love from our family members has better effect.

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- College students preparing to study for a degree.
- College students preparing to work in some big companies.
- High school graduates preparing for college entrance examination.
A: High school graduates preparing to have at-home training.