[Q]: Write a multi-choice question for the following article, with the given choices and answer: Article: We may not be aware of it, but ordinary family homes in the U.S. and the rest of the world are not energy-efficient. Most of their energy goes to heating and cooling, and a lot of it is wasted, as warm air and cool air escape through fireplace chimneys and thin or poorly fitting windows and doors. A passive house loses almost none."Imagine a thermos ,"said housing developer Brendan O'Neill."You have insulation everywhere, and it's basically completely sealed. And so the idea is to build a house like a thermos. So the windows are sealed. There's insulation completely surrounding the building. We make it as sealed as possible." A 147-square-meter passive house, presented by O'Neill Development Corp. as a demonstration unit just outside Washington, was brought to the site in two boxes."Once it's set and put together, it takes about four weeks to complete the outside construction, to put down carpets,"O'Neill said."If everything is set in place, you put a house like this together in about four months."The total cost of building it was $325,000, or about 17 percent more than constructing an ordinary house. But its utility bill is only around $20 monthly, or one-tenth the amount for the average house of the same size. While passive houses have been around for a long time, the idea has never taken root in the U.S. There was no driving force to push it. However, David Peabody, an architect who designs passive houses said,"I think climate change is now becoming a larger issue. And I think building standards are catching on to that. So people are becoming more aware of energy."Peabody said the cost of building passive houses could come down."What really makes sense for truly affordable housing,"he said,"is to build multi-storey buildings." Options: A Cautious. B Optimistic. C Skeptical. D Concerned. Answer: B Optimistic. Question:
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[A]: What's David Peabody's attitude to the future of the passive house?

input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: JANUARY 15, 2014 KYOTO -- A father froze to death while sheltering his eight years old daughter from severe weekend snowstorms that swept northern Japan. Fujita Makoto, one of at least nine people killed as snowstorms swept across Hokkaido , died as he tried to protect his only child Yumi against winds of up to 113 kilometers per hour in Hokkaido, as temperatures fell sharply to minus 6 degrees centigrade. Makoto's body was uncovered by rescuers looking for the pair after s raised the alarm. Yumi was wearing her father's jacket and was wrapped in his arms. The pair had last been heard from at 4 p. m. on Saturday, after fisherman Makoto picked his daughter up from a school where she was being looked after while he was at work. Makoto called his s to say his truck had become stuck in the driving snow, which was several meters deep in places. He told them he and Yumi would walk the remaining kilometers. The two were found just 300 meters from the truck at 7 a.m. on Sunday. Makoto had his body bent over his daughter, gently holding her in his arms and apparently using his body and a warehouse wall to provide shelter. The small girl was taken to hospital, where she was found to have no serious injuries. Her father was officially pronounced dead by doctors at the same hospital. The newspaper Yomiuri said Yumi's mother had died of illness two years earlier. The paper quoted neighbors as saying Makoto had been an extremely caring father who would often delay the start of his working day to enjoy breakfast with his daughter. His death came as families all over Japan celebrated Girls' Day, a festival in which they gather at home and decorate houses with dolls. "He reserved a cake for his only daughter and was looking forward to celebrating Dolls' Festival together," a neighbor told the Yomiuri. Options: A Yumi was wearing her father's jacket. B Makoto had his body bent over his daughter. C Makoto had been looking forward to Dolls' Festival. D Makoto called his s to say his truck had become stuck. Answer: D Makoto called his s to say his truck had become stuck. Question:
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output: Which of the following doesn't show the father's love for his daughter?

Problem: Write a multi-choice question for the following article, with the given choices and answer: Article: If you look at the night sky, you'll often see stars moving very quickly. In fact, they move much more quickly than they should according to their size and the laws of physics. Scientists do not completely understand why the speed of these stars is so high. But many believe the reason is that much of the universe is made of something called "dark matter". Groups of stars called galaxies, such as the Milky Way, might even be made up of 90 percent dark matter. How much something weighs depends on where it is. The same object weighs only half as much on Mars as it does on Earth and almost three times as much on Jupiter. So scientists prefer to talk about the mass of something rather than how much it weighs, because mass does not change. They can work out the mass of galaxies by measuring the distance between them and the speed they move at. Recently, Jorge Penarrubia, a senior academic at Edinburgh University, UK, and his team discovered something interesting: The mass of the Milky Way is only half as much as the mass of another nearby galaxy, Andromeda. This seems strange, and dark matter may explain why. Finding out more about dark matter could help us understand how the universe began, but this is not easy. Lots of scientists with different types of expert knowledge are working on the problem. We can't see dark matter, it's very difficult to measure and we can't find out its mass. Unlike stars, dark matter doesn't produce or reflect light. But we can make a good guess that it is there because of the way things move and the way light bends. Experts now think dark matter may be very different from the matter that we find on Earth. There may also be five times as much dark matter in the universe as ordinary matter. Options: A explain why the same object has a different weight on different stars B compare the distance between the Milky Way and Andromeda C show that studying dark matter could help to answer some scientific questions D support the idea that scientists prefer to talk about mass instead of weight Answer: C show that studying dark matter could help to answer some scientific questions Question:

A:
The author mentions the masses of the Milky Way and Andromeda mainly to _ .