TASK DEFINITION: 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.
PROBLEM: Article: A machine which makes water out of air could become the greatest household invention since the microwave. Using the same technology as a dehumidifier , the Water Mill is able to create a ready supply of drinking water by getting it from a limitless source-the air. The company behind the machine says not only does it offer all alterative to bottled water in developed countries,but it is a solution for the millions who face a daily water shortage. The machine works by drawing in damp air through a filter and over a cooling element which changes it into water droplets.It can produce up to 12 liters a day.The Water Mill will also produce more water when storms pass over, as the humidity in the air increases.In keeping with its ecodevelopment,the machine uses the same amount of electricity as three light bulbs. Inventor Jonathan Ritchey said:"The demand for water is .People are looking for freedom from water distribution systems that are shaky and unreliable". The machine,which is about 3 feet wide,is likely to costPS800 when it goes on sale here in the spring.Its maker, Canadian firm Element Four, estimates that a liter of water will cost around 20 pence to produce. Environmentalists claim half the world's population will face water shortage because of climate change by 2080.One in five humans is said to lack access to safe drinking water. The Water Mill is not effective in areas with below about 30 percent relative humidity, but with average relative humidity in England of more than 70 percent that won't be much of an issue here.
Answer: unlimited source

SOLUTION: According to the author, the biggest advantage of the machine is its _ .

PROBLEM: Article: Cheaters called "pirates" often use camcorders and cell phones to make illegal copies of blockbusters in the local theater. These pirates then sell those recordings on the street or over the Internet for very low prices. Some share them for free. "It's unfair for people to pirate movies, " says 15-year-old Hadaia Azad Ezzulddin. Movie piracy "takes money out of the pockets of thousands of people in the movie industry," she notes. Victims include famous actors and directors as well as local theater owners and their employees. Hadaia came up with an idea that could help stop movie piracy. Hadaia's idea uses infrared light. This range of light is invisible to the human eye. It is visible, however, to many types of cameras. Theater owners could place small infrared lights on their movie screens. The lights would not disturb people watching the movie. It would, however, distort the recordings made by many types of cameras. To test her idea, Hadaia built a box with a movie screen inside. Then, she projected images on that screen through a hole in the box. She took recordings of those images, using nine different types of cameras. These included the types found in cell phones as well as camcorders. During some tests, she also turned on light emitting diodes , or LEDs. The LEDs were embedded in a certain place behind the movie screen. They gave out infrared light. Sure enough, she showed, a pirated movie included odd stripes or spots if it had been recorded while the LEDs were on. It might be possible to use the LEDs to flash the date and time on the movie screen. The information would then appear in the illegal recordings. Theater owners or police might use the information to track down the pirates. Cutting down on piracy might get more people into theaters to watch the real movie instead of an illegal copy. Six out of every ten films now produced aren't profitable. They don't make enough money to recover how much was spent to make and market them. Such a poor payback can discourage filmmakers from producing anything but the types expected to become blockbuster hits. It might also keep smaller theaters from showing a wider variety of movie types.
Answer: make illegal copies of movies unpleasant to see

SOLUTION: Infrared lights are put on the movie screens to _ .

PROBLEM: Article: China's economy, the world's second largest,is showing signs of a rebound that could help it emerge from its worst economic period in l3 years. According to the latest government figures,growth picked up to 7.9%in the final three months of 2012.from 7.4%in the previous quarter.This was driven by state investment in infrastructure(,)projects and efforts to get consumers and companies to spend. Economic stability is seen as vital for China as its new leaders take over "It is obvious that the slowdown in the Chinese economy has _ for the moment."said Fraser Howie,an economist and co-author of Red Capitalism. "But one has to be mindful that any recovery will be limited in its scope,because of the various difficult and unexpected problems that China is facing,"he added. "The new leaders,who take charge in March,will now have to find the right balance between trying to prevent the formation of a property bubble and keeping a healthy growth rate going." That may prove tricky, especially because China's economic growth has slowed significantly from the highs of previous years,and analysts warn that state stimulus measures may decrease. On Friday,the statistical office reported that GDP...the Gross Domestic Product, the main measure of growth.increased by 7.8%in 2012, down from 9.3%in 2011.That was the slowest annual rate of growth since l 999.But it is still way above the weak growth rates experienced by most other major economies last year.Figures for the US,the world's largest economy,and Japan,the third largest.are expected to show growth of about 2%.The l7 members of the euro zone are collectively expected to contract by about 0.4%
Answer: 0.5%

SOLUTION:
China's economy growth in the final three months of 2012 is _ more than that in the previous quarter.