Article: People diet to look more attractive.Fish diet to avoid being beaten up,thrown out of their social group,and getting eaten as a result.That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists. The research team have discovered that subordinate fish voluntarily diet to avoid challenging their larger competitors."In studying gobies we noticed that only the largest two individuals,a male and female,had breeding rights within the group," explains Marian Wong."All other group members are nonbreeding females,each being 5-10% smaller than its next largest competitor.We wanted to find out how they maintain this precise size separation." The reason for the size difference was easy to see.Once a subordinate fish grows to within 5-10% of the size of its larger competitor,it causes a fight which usually ends in the smaller goby being driven away from the group.More often than not, _ is then eaten up. It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish.Whether they did so voluntarily,by restraining how much they ate,was not clear.The research team decided to do an experiment.They tried to fatten up some of the subordinate gobies to see what happened.To their surprise,the gobies simply refused the extra food they were offered,clearly preferring to remain small and avoid fights,over having a feast. The discovery challenges the traditional scientific view of how boss individuals keep their position in a group.Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves,so keeping their competitors small. While the habits of gobies may seem a little mysterious,Dr.Wong explains that understanding the relationships between boss and subordinate animals is important to understand how hierarchical societies remain stable. The research has proved the fact that voluntary dieting is a habit far from exclusive to humans."As yet,we... Question: What is the text mainly about? Yes or no, is the answer "Fish dieting."?
No

(Question)
Article: Two Chinese farmers who became an overnight hit when their heart-rending version of a famous pop song appeared on the Internet took to the stage in front of thousands of fans in Shanghai last Saturday. Wang Xu, 44,and Liu Gang, 29, sang "In the Spring" alongside the song's star composer Wang Feng, in front of about 80,000 people at the Shanghai Stadium. The audience buzzed with excitement and let out deafening cheers, the moment as they were introduced on the stage and then when Liu started the first sentence of their parts of the song. The two migrant workers became stars after singing the tearjerker song during an evening drinking session in a 6-square-meter rented room in a late August evening. A friend recorded the performance on a cell phone and posted it on the Internet. "If someday I am dead, please bury me in the spring," they sing. Wang's penetrating chorus, delivered with his eyes closed, has moved thousands to tears. Wang and Liu consider the song a true portrait of lower-class groups like themselves. "With no credit card, no girlfriend, or a home with hot water, but only a guitar, I am singing happily, on streets, under bridges or in wild country, though nobody pays attention to the music," they sing. To support his wife and two sons, Wang came to Beijing in 2000 from the countryside and has worked as a boiler man, and street peddler, before becoming a medical warehouse keeper, with a monthly pay of around 1,500 yuan. Little is left after he pays 600 yuan for rent and buys food. Liu came to Beijing in 2002. "I wanted to try my luck in the big city, " he said. He had worked as a guard, roadside peddler, and porter, but never had a stable job. Street performing was his main income, even after he married and became a father three years ago. Wang and Liu are still uncertain where their fame will lead. Wang has started learning to use a computer. They even have a micro blog account to communicate with fans. Question: People like Wang and Liu's version of "In the Spring" because _ . Yes or no, is the answer "it is a heartfelt expression of the two singers as migrant workers."?
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No

Article: All day long he flew, and at night-time he arrived at the city. "Where shall I put up?" he said; "I hope the town has made preparations." Then he saw the statue on the tall column. "I will put up there," he cried; "it is a fine position, with plenty of fresh air." So he flew down and settled just between the feet of the Happy Prince. "I have a golden bedroom," he said softly to himself as he looked round, and he prepared to go to sleep; but just as he was putting his head under his wing a large drop of water fell on him. "What a curious thing!" he cried; "there is not a single cloud in the sky, the stars are quite clear and bright, and yet it is raining. The climate in the north of Europe is really dreadful." Then another drop fell. "What is the use of a statue if it cannot keep the rain off?" he said; "I must look for a good chimney-pot," and he determined to fly away. But before he had opened his wings, a third drop fell, and he looked up, and saw--Ah! What did he see? The eyes of the Happy Prince were filled with tears, and tears were running down his golden cheeks. His face was so beautiful in the moonlight that the little Swallow was filled with pity. "Who are you?" he said. "I am the Happy Prince." "Why are you weeping then?" asked the Swallow, "you have quite wetted me." "When I was alive and had a human heart," answered the statue, "I did not know what tears were, for I lived in theprefix = st1 /PalaceofSans-Souci, where sorrow is not allowed to enter. In the daytime I played with my companions in the garden, and in the evening I led the dance in the Great Hall. Round the garden ran a very high wall, but I never cared to ask what lay beyond it, everything about me was so beautiful. People called me the Happy Prince, and happy indeed I was, if pleasure be happiness. So I lived, and so I died. And now that I am dead they have set me up here so high that I can see all the ugliness and all the misery of my city, and though my heart is made of lead yet I cannot... Question: The swallow wanted to put up when he arrived at the city because _ . Yes or no, is the answer "he had a whole-day flight and wanted to sleep."?
No