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: Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing decisions that denied victory to their team. A researcher was appointed to study the performance of some top referees. The researcher organized an experimental tournament involving four youth teams. Each match lasted an hour, divided into three periods of 20 minutes during which different referees were in charge. Observers noted down the referees' errors, of which there were 61 over the tournament. Converted to a standard match of 90 minutes, each referee made almost 23 mistakes, a remarkably high number. The researcher then studied the videotapes to analyse the matches in detail. Surprisingly, he found that errors were more likely when the referees were close to the incident. When the officials got it right, they were, on average, 17 meters away from the action. The average distance in the case of errors was 12 meters. The research shows the optimum distance is about 20 meters. There also seemed to be an optimum speed. Correct decisions came when the referees were moving at a speed of about 2 meters per second. The average speed for errors was 4 meters per second. If FIFA, football's international ruling body, wants to improve the standard of refereeing at the next World Cup, it should encourage referees to keep their eyes on the action from a distance, rather than rushing to keep up with the ball, the researcher argues. He also says that FIFA's insistence that referees should retire at age 45 may be misguided. If keeping up with the action is not so important, their physical condition is less critical.
Answer: analyse the causes of errors made by football referees

SOLUTION: The experiment conducted by the researcher was meant to _ .

PROBLEM: Article: Lying on his sickbed in hospital, all 86-year-old Lin Ruiming can do is stare out at a tiny part of sky through the small window. The old man used to ride his motorbike through the busy streets of downtown Beijing. All the while he could only dream of touring the world. He has been suffering from terminal lymphoma since February. As a last gift, his granddaughter,Lin Yifan,asked China's Internet population to give her grandfather a shot at globetrotting . Last week, Lin Ruiming's _ from Sydney Harbor, Australia, to the River Thames in London, UK, and even to a volcano in Auckland, New Zealand. Lin Yifan, 29, had promised to paint a portrait of her grandfather, but had almost forgotten her word until the old man got ill. "I had put off the painting for many years because I believed I would have plenty of time to do it," she said. She spent one evening last week working on a portrait, based on a photo taken on her grandfather's birthday last year. She posted the portrait on Sina Weibo, and called for Web users to take photos with the portrait in different locations and send them to her on May 11.Over the following five days she received about 20,000 photos, most of which were sent by people she had never met. She says that her grandfather, while too weak to view all the photos, has said that he is happy. "Thanks to all these helpers, I have become a celebrity around the world," the old man joked.
Answer: she believed she could do it anytime

SOLUTION: Lin Yifan put off painting the portrait mainly because _ .

PROBLEM: Article: As a music teacher for twenty-seven years, I have always known that music touches the soul. It can break through all kinds of barriers to reach students in a very special way. It can be the means for each child to find their light. A few years ago, I was blessed with the opportunity to teach pre-school students one afternoon a week. One of my most memorable students was Vanessa. She was five years old, had difficulty walking, and could not speak. We mostly sat on the floor for our music lessons and Vanessa liked to sit on my lap. One of her favorite songs was John the Rabbit. It was a call and response song where I sang the call and the students clapped two times while singing the repeating phrase, "Oh, yes!" Vanessa liked to put her hands together with mine and clap with me. We performed that song during every class, Vanessa and I clapping together. She never said or sang a word. One day late in the school year, when the song was finished, Vanessa turned around, looked me in the eye, clapped her tiny hands two times and said the words "Oh, yes!" I opened my mouth and could not speak. Through music, we had made a connection. Several years later, I came across Vanessa on the street in town. I stopped my car and waved to say hello. She waved back with a big smile on her face and then clapped her hands two times, mimicking the song we had performed in our music class. This precious little girl, through her connection with music, left an impression on me that will last forever. Every child has the ability to learn and grow. It is up to us educators to discover the way to reach each and every one of our students. We all must find each child's light.
Answer: Can connect heart to heart

SOLUTION:
The author thinks music _ .