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.

[Q]: Article: "My dream has come true.I have always wanted to be a Grand Slam champion." These are the words of the Chinese tennis player Li Na after she became the first Asian woman to win the Australian Open final on Jan.25th.2014. "People were saying I'm getting old.So this is a great success for such an old woman." the 32-year-old girl joked. Miss Li has a tattoo . She has dyed her hair many different color1s.And, at the 2008 Beijing Olympics, she told her fans to "shut up" when they got too noisy in their support. Li Na was born in Wuhan.She started to play tennis at the age of 6.She once recalled: "As a child. I suffered a lot because every day I had to wake up early to practice.After school I had to practice more.I didn't have time to play." Luckily, the strong girl didn't give up. thus making history for Chinese tennis time after time.Now the new champion is already thinking about winning another Grand Slam title."When you have one title, surely you will think about another," she says. not hiding her ambition. "Chinese people are so lacking in confidence on the tennis court.If there is a person like me who can prove we Chinese can do it, the other young players in China will feel the same." she said.
Answer: 1988
[A]: Li Na began to learn playing tennis in the year of _ .

[Q]: Article: My father was a foreman of a sugar-cane plantation in Rio Piedras, Puerto Rico. My first job was to drive the oxen that ploughed the cane fields. I would walk behind an ox, guiding him with a broomstick. For $ 1 a day, I worked eight hours straight, with no food breaks. It was very _ work, but it prepared me for life and taught me many lasting lessons. Because the plantation owners were always watching us, I had to be on time every day and work as hard as I could. I've never been late for any job since. I also learned about being respectful and faithful to the people you work for. More important, I earned my pay; it never entered my mind to say I was sick just because I didn't want to work. I was only six years old, but I was doing a man's job. Our family needed every dollar we could make because my father never earned more than $ 18 a week. Our home was a three-room wood shack with a dirty floor and no toilet. Nothing made me prouder than bringing home money to help my mother, father, two brothers and three sisters. This gave me self-esteem , one of the most important things a person can have. When I was seven, I got work at a golf course near our house. My job was to stand down the fairway and spot the balls as they landed, so the golfers could find them. Losing a ball meant you were fired, so I never missed one. Some nights I would lie in bed and dreamt of making thousands of dollars by playing golf and being able to buy a bicycle. The more I dreamed, the more I thought. Why not? I made my first golf club out of guava limb and a piece of pipe. Then I hammered an empty tin can into the shape of a ball. And finally I dug two small holes in the ground and hit the ball back and forth. I practiced with the same devotion and intensity . I learned working in the field -- except now I was driving golf balls with club, not oxen with a broomstick .
Answer: to spot the balls as they landed so the golfers could find them
[A]: The writer's first job was _ .

[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
[A]:
Something that weighs 15kg on Earth weighs about _ on Mars and _ on Jupiter.