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: They sit by the door waiting for me. And while I may speak more about the narrowness of my very limited life than their real worth, just the fact that they're sitting there, waiting for me, makes me happy. I speak, of course, of my wonderful, brilliant, intelligently designed, calf-high rubber boots. They are a piece of industrial genius . They are real and vibrant , and make my life more worth living. My rubber boots are real and they do not fail me. I slip them on over my socks at a moment's notice. They go on easily. My feet feel joyful like the wagging tail of a dog waiting for its walk. My feet know they are safe. I step outside the house and nothing can stop me--the late season snowstorm, the pool of standing water at the bottom of my doorsteps that will never give off, the mud and dirt this season brings. My feet are warm and dry and happy. And so am I. My boots are modest. They make no promise they can't keep. I found them at one-third the price of the long boots I looked at longingly for years. Mine are American-made and inexpensive and unattractive and brown and solid. They are now three years old and still look new. I know I will have them forever. I will die with them on. They are homely and they are wonderful. My rubber boots make me braver and kinder and more generous. Yes, I will get the mail. Yes, I will get the newspaper. Yes, I will walk the dog. Yes to the garbage. Yes. Yes. Yes. I have rubber boots, good strong rubber boots--and I am not afraid.
Answer: it must be very cold in winter where the writer lives

SOLUTION: We can infer from the passage that _ .

PROBLEM: 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

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

PROBLEM: Article: Mr. Lang worked in a factory. As a driver he was busy but he was paid much. His wife was an able woman and did all the housework. When he came back, she took good care of him and he never did anything at home. So he had enough time when he had a holiday. A few friends of his liked gambling and he learned it soon. So he was interested in it and hardly forgot anything except gambling. He lost all his money and later he began to sell the television, watches and so on. His wife told him not to do it but he didn't listen to her. She had to tell the police. He and his friends were punished for it. And he was nearly sent away. After he came out of lock-up , he hated her very much and the woman had to leave him. It was New Year's Day. Mr. Lang didn't go to work. He felt lonely and wanted to gamble again. He called his friends and they came soon. But they were afraid the police would come. He told his five-year-old son to go to find out if there were the policemen outside. They waited for a long time and didn't think the police would come and began to gamble. Suddenly a few policemen opened the door and came in. "I saw there weren't any policemen outside, Daddy" said the boy "So I went to the crossing and asked some to come."
Answer: he had worked there for a long time

SOLUTION:
Mr. Lang was paid much because _ .