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.

[EX Q]: 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.
Answer: 7.5 kg; 45 kg
[EX A]: Something that weighs 15kg on Earth weighs about _ on Mars and _ on Jupiter.

[EX 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
[EX A]: The author's purpose in writing the passage is to _ .

[EX Q]: Article: Although there are no state controlled survival courses in Britain or the United States, there are various independent organizations offering similar activities. Students can participate ( take part ) in outdoor training courses through university clubs and societies . Anyone can register ( ) with such groups , which then organize courses ,training and trips for all members . One of the most popular outdoor training programmes in both the US and Britain , is Outward Bound ( ) . It was founded in 1941 in Wales and attracts hundreds of thousands of adventurous types every year . The courses are to broaden minds through experiences that build confidence , self-esteem ( ) and character . As well as specialist courses such as canoeing , leadership skills and sailing , participants can take part in week long adventure training camps which include a host of sports and survival training education skills . Michael Williams , an American student , took part in an Outward Bound course last year . He said : "We learned lots of first aid skills , lots of natural history , lots of environmental facts , and participated in a wildlife preservation ( protecting ) programme . Beyond that , my favorite skills learned were sailing and rock climbing ." Courses can last up to 40 days and are open to anyone over the age of 14 . Students must be in general good health , but do not need to be experienced in outdoor-sports . There is no selection process ; everyone is welcome , although new participants are advised to pick a course matching their physical power . Most of the British courses take place in the Beacons in Wales . Another similar organization is the UK Survival School , which includes courses on learning to live with the environment , sailing and winter survival . On a basic survival weekend students will learn how to get water and food , how to make fire and cook with it , to find and build a shelter , control survival life support , how to cross rivers , send off an SOS signal , and to use compasses by day and night . According to the leaders , such adventures are "an awakening , an exploration into unknown." Outward Bound believes that participants will "use mind and body traveling some of the earth's roughest wildness areas ."
Answer: participants can learn how wonderful nature is
[EX A]:
The advantage of the training courses is that _ .