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.

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

Article: Time:2017-01-24 From:kekenet.com Editor: clover The head of China's largest online seller Alibaba does not think China and the United States will have a trade war despite comments from the Trump administration. Jack Ma is the chairman of the Alibaba Group. At the World Economic Forum meeting in Davos, Switzerland, he said, "China and (the) U.S. will never have a trade war. Give Trump some time. He's open-minded, he's listening." _ said he would do all he could to prevent trade relations between the countries from getting worse. Last week, Ma met with Trump at the Trump Tower in New York City. The Chinese billionaire is said to have discussed a plan to permit one million small U.S. businesses to sell goods on Alibaba's online shopping platform. During the campaign and after winning the presidential election, Trump strongly criticized the Chinese government's support for its businesses. He blamed unfair trade policies for taking away U.S. jobs. And he said that China unfairly controls the exchange value of its currency, the yuan. Trump also has threatened to place import taxes on goods from China and other countries in response to their trade policies. According to theSouth China Morning Post, Ma said, "American international companies made millions and millions of dollars from globalization." He added that the U.S. should not blame the loss of jobs and companies on globalization. However, a new study by an American business group says many U.S. businesses feel unwelcome in China. The companies say the cost of doing business in China is increasing. They add that rules and regulations are unclear or not enforced in a consistent way. The American Chamber of Commerce in China led the study, which looked at responses from 462 companies. William Zarit is chairman of the chamber. He says trade policies in China make it difficult for American companies. He says, "we feel that over the last few years that we've been taken advantage of to some extent, with our open market and the lack of open areas in the Chinese market." Another major concern for U.S. companies in China is fake products. Fake products are copies of the originals that cost businesses with the legal right to sell them millions of dollars each year. Ma defended Alibaba's efforts to fight fake products on its shopping platform. He said his company is doing all it can to fight the problem. "Fighting against fake products is a war against human greediness," Ma said. I'm Mario Ritter.
Answer: global news
The text likely take from the _ .

Article: Have you ever suddenly felt that someone you know was in trouble -- and he was? Have you ever dreamed something that came true later? Maybe you have ESP. ESP stands for Extra Sensory Perception. It may be called a sixth sense. It seems to let people know about events before they happen, or events that are happening some distance away. Here is an example: A woman was doing washing. Suddenly she shouted, "My father is dead! I saw him sitting in the chair!" Just then, a telephone came. The woman's father had died of a heart illness. He died sitting in a chair. There are thousands of stories like this on record. Scientists are studying them to find out what is behind these strange mental messages. Here's another example ---- one of hundreds of dreams that have come true. A man dreamed he was walking along a road when a horse and carriage came by. The driver said, "There's room for one more." The man felt the driver was Death, so he ran away. The next day the man was getting on a crowded bus. The bus driver said, "There's room for one more". Then the man saw the driver's face was the same face he had seen in the dream. He wouldn't get on the bus. As the bus drove off, it crashed and burst into fires. Everyone was killed! Some people say stories like these are lies or coincidences. Others say that are ESP in true, from studies of ESP, we may some day learn more about the human mind.
Answer: heart illness
ESP lets people know about _ .