[Q]: Write a multi-choice question for the following article, with the given choices and answer: Article: BC Social Report, August 14, 2010 Scandinavians may spend a lot of the winter in darkness but they are the happiest people in Europe, according to a study showed this month. Countries like Denmark and Finland scored highest on the study of happiness in Europe carried out by Cambridge University, which also found that the sunny southern countries of Italy, Portugal and Greece got the least joy out of life. The survey entitled: "No Man is an Island" showed that countries where people enjoy time with friends and family, have trust in government and national institutions were more likely to be happy than those living in a sunny climate. The study rated respondent on their overall sense of happiness and life satisfaction on a _ of one to 10. Danes --who expressed a high level of trust in their politicians and public institutions--came top of the field at 8.3. Italians--who reported lower levels of satisfaction with their national quality of government--came last at 6.49.' "Italy, Greece, Portugal, Germany and France report the lowest levels of happiness while the Scandinavian Countries, Netherlands and Luxembourg report the highest," the study said. Although Europeans are generally four times wealthier than their fathers and grandfathers, their levels of happiness are either equal to or lower than 40 years ago. The study also looked at factors contributing to happiness within countries and surprisingly found that an interest in politics actually increased happiness. Lead researcher Luisa Corrado said tax cuts and throwing money at social problems appeared to have no effect on the happiness of citizens when compared with government policies which strengthened and supported wider social networks. "People are less naive ( ) than one would expect, politicians need to adapted their policies and target specific problems in specific areas," she said. Options: A Scandinavians are the happiest people in the world B the research is carried out by Oxford University C the people of the northern countries are much happier D Italians expressed their trust in politics and institutions Answer: C the people of the northern countries are much happier Question:
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[A]: According to the passage, we can know _

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: Alex stared through the cabin window at the darkness. Soon his dad would call him. And he didn't want to go. He wished he hadn't come to the lake for the weekend. "We're ready," Dad said as he came in from the porch. " Grab your rod." Alex turned away from the window and slowly picked up his fishing rod. "Have fun!" Mom said. "Sure," said Alex, trying to make his voice bright. "We should have done this before." Dad said. "Let's catch a big one!" Dad picked up his tackle box, rod, and bait can from the porch. He clicked on the flashlight. They walked down the hill toward the lake in the narrow beam of light. The only thing Alex could see was the circle of weeds and rocks at their feet, lit by the flashlight. Insect voices filled his ears---clicks, hums, buzzes, whines. Hundreds of bugs waited in the darkness to attack. "Ow!" he blurted as he felt a sting on his arm. "Mosquitoes," Dad said. "I have brought some spray to keep them off." When they reached the boat, Alex stumbled as he climbed over the side. "I don't like this much," he said. "It's so dark." Dad squeezed his shoulder. "Don't worry. It's not as dark as you think. After a while your eyes will get used to the night." Suddenly something rushed past Alex's head. He gasped. "What was that?" "Probably a bat," Dad said. How could Dad act as if it were nothing! "Will bats be flying around our heads the whole time?" "This is their time to be out catching insects," Dad explained. "They won't hurt you. They're too busy grabbing dinner." He pushed the boat off the gravel and jumped in. Alex gazed back at the cabin. A square of light from the window glowed in the darkness. Dad rowed to the middle of the lake and stopped. "We'll just let the boat drift. Keep the flashlight in the bottom of the boat. The fish won't bite if they see light flashing around. When we've done baiting our hooks , we'll turn the light off." Leaning down to get closer to the light, Alex tried to thread a worm on his hook, but he couldn't seem to work his fingers right. So... Options: A to sleep well B not to frighten off the fish in the lake C to get to used to the night D to catch big fish Answer: B not to frighten off the fish in the lake Question:
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output: They turned the flashlight off _ .

Problem: Write a multi-choice question for the following article, with the given choices and answer: Article: What will power your house in the future? Nuclear, wind, or solar power? According to scientists at the Massachusetts Institute of Technology (MIT) in the US, it might be leaves -- but artificial ones. Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis . Now researchers have found a way to imitate this seemingly simple process. The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts . Similar to natural leaves, it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell, which uses those two materials to produce electricity, located either on top of a house or beside the house. Though the leaf is only about the shape of a poker card, scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. "One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology," said Nocera at a conference of the American Chemical Society. The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf, by contrast, is made of cheap materials, easy to use and highly stable. In laboratory studies, Nocera showed that an artificial leaf prototype could operate continuously for at least 45 hours without a drop in activity. The wonderful improvements come from Nocera's recent discovery of several powerful, new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now, the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides, the device can run in whatever water is available; that is, it doesn't need pure water. This is important for some countries that don't have access to pure water. With the goal to "make... Options: A saving energy B a mixture of water power and solar energy C an invention copying photosynthesis D an introduction to the history of artificial leaves Answer: C an invention copying photosynthesis Question:

A:
The main idea of this passage is about _ .