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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.
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Article: Although most people know there are Seven Wonders in the Ancient world, only few people can name them. This is because most of them are no longer there except the pyramids. However, there is a growing list of wonders of the world today. About nine years ago, UNESCO's World Cultural and Nature Heritage List had 411 places and 136 countries were responsible to protect them, and the list keeps on growing. Usually it is the task of a group of 21 experts to decide which places go on the list. The experts are chosen to work for six years. Their work is to examine and discuss the suggestions from different countries. They also manage the World Heritage Fund which can offer help to countries for protection work. Over the past centuries a lot of cultural or historic places have been destroyed by man or nature. Protecting our natural and cultural heritage is a long and difficult task. Earthquakes, floods, pollution, wars, or even tourism are some of the dangers that harm the heritage. When a historic place is in great danger, it is put on the World Heritage in Danger List and necessary things will be done to protect it. Places which are on the danger list include Historic Bridges of Indiana, St. Elizabeth's Hospital, Rosenwald School in Southern U.S., etc.
Answer: the pyramids
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.The Seven Wonders of the Ancient World include _ .

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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
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Something that weighs 15kg on Earth weighs about _ on Mars and _ on Jupiter.

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Article: In China, if you are not married by the time you are 30, you are _ trouble: social blame and pressure from family and friends can get you down. And if you are a woman, it's even worse. Many young people get married simply to get other people off their backs . This is a serious compromise. One ends up not marrying the ideal partner. There are, however, a few young people who refuse to compromise: if they can't find a good marriage partner, they say, they would rather not marry at all. 34-year-old Kate is a university lecturer in English. She said she would not describe herself as celibatarian but simply a woman who hasn't come across the right man yet. She has sharp comments for the way in which the old generation looks at marriage. "Many people think marriage is a duty---to your parents, family and society. Nobody cares if your marriage is happy or not, she said, I think this is very wrong and I intend to live and act according to my own will." Happily for her, her parents are open-minded and not lay stress on her. But the same does not apply to her friends. They are constantly trying to get her together with some young man or another. She always refuses politely.
Answer: women should get married earlier than men
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The main idea of this passage is that _ .