In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Q: Article: A global positioning system(GPS)service is aiding the elderly in the Panlong district of Kunming,capital of Southwest China's Yunnan province. The telecommunications service provider,with the support o,f the local govemment,started the GPS tracking service in January to help the elderly,especially those with Alzheimer's disease,a condition that slowly destroys memory. Huang Haiying,an employee with a local telecommunications company,told China Daily that with the GPS devices ,the people who look after the elderly can quickly find their positions either online or by ca l l ing the service center in case ot emergencles. The system is also connected to the police,hospitals,fire services and community service centers to ensure that the elderly get quick and proper help,Huang said. Experts said that this service could improve the quality of life for thousands of elderly people with Alzheimer's,their families and those who look after them. Hundreds of people have already been helped by the service this year,Huang said. Huang said that the system has about 1 0,000 subscribers and she expects that number to grow 1 0 times over the next three years.A user pays 25 yuan($4)each month for the service.A family with an income below the local poverty line can get a 10 yuan subsidy evcry month from the government. The local government has spent more than 2 million yuan to subsidize the service to date. Rao Yuehui,director of the Panlong civil affairs department,said that about 90,000 people,or 15.4 percent of the district'S population,are more than.60 years old. He Xiangqun,an official with the Yunnan provincial civil affairs department,said that this means that the population meets international standards classifying it, as an aging society as defined by the United Nations.
Answer: a local telecommunications company

A: The GPS service mentioned in the passage is _ .
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Q: Article: Environmental protection is frequently talked about nowadays. The authorities are doing their best to arise the public awareness of the vital importance of the environmental protection. This issue is, indeed, worth following up. Environmental protection is closely related not only to our personal life, but also to the entire human race and the world's further development. For one thing, the environment, in a narrow sense, determines the quality of our individual life. The air we breathe, the water we drink, the food we eat, etc. , all come directly from the environment. If they continue to be contaminated, we may have neither clean water, nor healthy food. For another thing, in a broader sense, the environment plays a decisive role in fate of mankind. As is known to all, the earth, up to now, is human being's only dwelling place. We can expect that some day we will live on another planet, but I doubt that this day will come earlier than the day when the earth becomes a globe of waste, if we keep damaging the environment. Finally, the environment is essential to the further development of the world. Extensive industrialization, which has brought about all the convenience and facilities we enjoy today, has been depending on the comprehensive exploitation of the earth's natural resources found in the environment. If we do not protect the environment properly, further development cannot be guaranteed. In a word, to protect the environment is an urgent task. Nevertheless, environmental protection is indeed a demanding task. Many people are still, either unconscious of the urgency of the task or deliberately damaging the environment for the interests of their own. Hence, we should adopt severe measures to prohibit people from doing more harms to the environment. Meanwhile, we need to make the gravity of the present situation known to all. In other words, punishment and instruction should be equally emphasized. Only in this way can we look forward to a cleaner and greener world.
Answer: stress the importance of protecting environment

A: The author's purpose in writing the passage is to _ .
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Q: 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.
Answer: the car hit something on the road

A:
The brown car came back and forth because_.
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