Problem:OPTIONS:
- their findings are helpful to identifying the kinds of job demands
- people who do more complex jobs may benefit later thinking skills greatly
- there exist links between job demands and preservation of memory
- he didn't confirm the links between complex jobs and later thinking skills

Read the following article and answer the question. Article: People with mentally taxing jobs, including lawyers and graphic designers, may end up having better memory in old age, research suggests. A study of more than 1,000 Scottish 70-year-olds found that those who had had complex jobs scored better on memory and thinking tests. One theory is that a more stimulating environment helps build up a "cognitive reserve" to help buffer the brain against age-related decline. The research was reported in Neurology. The team, from Heriot-Watt University, in Edinburgh, is now planning more work to look at how lifestyle and work interact to affect memory loss. Those taking part in the study took tests designed to assess memory, processing speed and general thinking ability, as well as filling in a questionnaire about their working life. The analysis showed that those whose jobs had required complex skills in dealing with data or people, such as management and teaching, had better scores on memory and thinking tests than those who had done less mentally intense jobs such as factory workers, bookbinders, or carpet layers. While the study did not look at biological reasons for the protective effect of certain jobs, potential explanations include that structural changes within the brain mean less damage is accumulated over time. Study leader Dr Alan Gow said: "Our findings have helped to identify the kinds of job demands that preserve memory and thinking later on." "However," He added, "while it is true that people who have higher cognitive abilities are more likely to get more complex jobs, there still seems to be a small advantage gained from these complex jobs for later thinking skills." Dr Simon Ridley, head of research at Alzheimer's Research UK, said the study added to the growing evidence about factors that affected brain health as we aged. "Keeping the brain active throughout life could be helpful and different types of work may play a role. However, it's important to note that this study points to a small and subtle association between occupation and later-life cognition... Question: What Dr Alan Gow said implies that _ . Answer:
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A: there exist links between job demands and preservation of memory

Problem:OPTIONS:
- 59.6% of Samoans are considered obese.
- Samoa Air introduces pay-by-weight pricing.
- Airlines should charge obese passengers more.
- Baggage must be calculated as passengers' weight.

Read the following article and answer the question. Article: A Samoan airline says that it is the world's first carrier to charge passengers by their weight. Samoa Air, which opened in 2012, asks passengers to give their personal weight during booking, which is then charged according to the length of a flight. The customers will also be weighed just before they board the plane. "It is believed that all people throughout the world are the same size," Samoa Air CEO Chris Langton said. "Airplanes always run on weight, not seats." "There is no doubt in my mind that this is the concept of the future. This is the fairest way of your travelling with your family or yourself." Though the airline introduced the plan last November, it caught people's attention last week when the carrier began international flights to neighboring American Samoa. Almost at the same time, a Norwegian economist, Bharat Bhatta, published a report suggesting that airlines should charge obese passengers more. The Pacific Islands contain some of the world's most common countries for obesity, many ranking in the top 10, according to the World Health Organization (WHO). Samoa is ranked number four, with 59.6 percent of the population considered obese, said the most recent WHO report. According to Samoa Air's latest schedule, the airline charges up to $0.57 per kg for flights in Samoa and $1.03 per kg for its only international flight to American Samoa, around 250 miles. Children under 12 are charged 75 percent of the adult rate, with fares also based on weight. Any overweight baggage is calculated at the same rate as the passenger's personal weight. The plan could actually prove cheaper in some cases, such as for families travelling with small children, and Langton said customer reaction has mainly been "amazingly positive". The idea of charging passengers by weight has been hotly discussed before, and in the US some airlines require those who do not fit into a seat comfortably to buy a second seat. Question: What does the text mainly tell us? Answer:
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A: Samoa Air introduces pay-by-weight pricing.

Problem:OPTIONS:
- An unforgettable thing happened on the highway.
- A helpless old man didn't know what to do with his daughter's illness.
- lt is necessary to improve the medical technique.
- There are good people around the world, who can give us help in time.

Read the following article and answer the question. Article: A trucker relates that he was traveling through rural North Carolina on I-95 when a brown car combined onto the highway. It came back and forth between lanes, causing the driver of the truck to change into a lower position. At first he thought the driver was drunk, but when he came closer, the trucker saw an old man shaking uncontrollably behind the wheel. He noticed a Citizen's Band aerial shaking to and fro as the car pulled suddenly between lanes, so he called on the radio: "You in the brown Chevy, if you can hear me, pull over. Pull off the road!" Amazingly, he drdf The trucker pulled up behind the car and climbed from his cab . The elderly man staggered from his auto and fell into the trucker's arms. He poured out a story of months of fear and pain that accompanied the illness of his only daughter. Now he was returning from the hospital where it was decided that she would stop any further treatment. In the hospital he remained "strong", but out on the road he fell apart. The two men talked for the good part of an hour. The father eventually decided to share his pain with his ciaughter and said he felt good enough to drive home. The men embraced and the trucker followed him for 50 miles. As they drove along, the two talked together on the radio. The older man finally acknowledged that his exn was ahead and thanked his new friend again for the help. The trucker asked if he could make it home all right and, suddenly, a third voice broke in on the conversation: "Breaker 19, cjon't worry, good buddy. Go your way. I'll see him home" Glancing in his mirror, he saw another truck move into the exit lane behind the brown car. I think there are good people the world over. People who will gladly give that caring touch, a needed warm embrace or a patient and listening ear. They are like angels who lift us to our feet when our wings have trouble remembering how to fly. Question: What does the author mainly want to tell us? Answer:
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A:
There are good people around the world, who can give us help in time.