Read the following article and select the best answer. Article: Fish have different personalities which change as they experience life's highs and lows.according to British biologists. Researchers identified different"personalities" in their fish by observing the boldness or shyness of individuals,according to The Nature.Like people,some fish are very confident in the face of novelty or conflict;while others are silent and fear. The scientists selected particularly bold and shy rainbow trout,and tested whether they changed their outlook depending on what life threw at them.They arranged some fish to fight and others to watch to see how both the participants and observers responded to victories and defeats.Winning or losing a fight,or even watching fellow fish overcome the difficulties influenced the future behavior of the _ studied in the lab. The researchers made fish compete with much larger or smaller opponents.to ensure that they would win or lose their fights.These bold fish that won their fights tended to be even bolder when later presented with a novel food item;losing their fight caused them to be much more cautious. Fish also learn by watching others.Bold fish watching a shy fish exploring a mystery object were much more nervous when later given a novelty item for themselves. Predictably,shy fish that won a fight also gained more confidence,but surprisingly,shy fish that lost their fights also grew bolder when exploring strange new food,Sneddon said,adding that this could be due to what she calls a"desperado effect" . The new research suggests that animals can gradually adapt their personalities.The results echo the effects that life experience can have on human. Question: What can we know from the research? - Bold losing fish become--e bolder when presented With a novel food item. - Losing their fights causes the bold fish to be much more courageous. - Bold fish watching a shy fish exploring a mystery get less nervous. - Shy fish losing fights grow more confident in exploring new food.
Shy fish losing fights grow more confident in exploring new food.

Read the following article and select the best answer. Article: A few degrees can make a big difference when it comes to food storage. Foods can go bad if they get too warm. But for many of the world's poor, finding a good way to keep food cool is difficult. Refrigerators are costly and they need electricity. Yet spoiled food not only creates health risks but also economic losses. Farmers lose money when they have to throw away products that they can not sell quickly. But in 1995, a teacher in northernprefix = st1 /Nigerianamed Mohammed Bath Abba found a solution. He developed the "Pot-in-Pot Preservation/Cooling System". It uses two round containers made of clay. A smaller pot is placed inside a larger one. The space between the two pots is filled with wet sand. The inner pot can be filled with fruit, vegetables or drinks. A piece of wet cloth covers the whole cooling system. Food stored in the smaller pot is kept from spoiling through a simple evaporation process. Water in the sand between the two pots evaporates through the surface of the larger pot, where drier outside air is moving. The evaporation process creates a drop in temperature of several degrees. This cools the inner pot and helps keep food safe from harmful bacteria. Some foods can be kept fresh this way for several weeks. People throughoutNigeriabegan using the invention. And it became popular with farmers in other African countries. Mohammed Bah Abba personally financed the first five thousand pot-in-pot systems for his own community and five villages nearby. In 2000, the Rolex Watch Company ofSwitzerlandhonored him with the Rolex Award forEnterprise. This award recognizes people trying to develop projects aimed at improving human knowledge and well-being. A committee considers projects in science and medicine, technology, exploration and discovery, the environment and cultural history. Winners receive financial assistance to help develop and extend their projects. The award is given every two years. The next one will be given in 2008. Question: According to the text, why will the food in the inner pot not go bad? - The temperature is lower than the outside. - Both of the pots are made of clay. - It is covered with a wet cloth. - Drier air is moving outside the pots.
The temperature is lower than the outside.

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Read the following article and select the best answer. Article: Hank Viscardi was born without legs.He had not legs but stumps that could he fitted with a kind of special boots,People stared at him with cruel interest.Children laughed at him and called him'Ape Man' because his arms practically dragged on the ground. Hank went to school like other boys.His grades were good and he needed only eight years to finish his schooling instead of the usual twelve.After graduating from school,he worked his way through college. He swept floors,waited on table,or worked in one of the college offices.During all this busy life,he had been moving around on his stumps.But one day the doctor told him even the stumps were not going to last much longer.He would soon have to use a wheel chair. Hank felt himself got cold all over.However, the doctor said there was a chance that he could be fitted with artificiallegs .Finally a leg maker was found and the day came when Hank stood up before the mirror, for the first time he saw himself as he has always wanted to be-a full five feet eight inches tall.By this time he was already 26 years old. Hank had to learn to use his new legs.Again and again he marched the length of the room,and marched back again.There were times when he fell down on the floor, but he pulled himself up and went back to the endless marching.He went out on the street.He climbed stairs and learned to dance.He built a boat and learned to sail it. When World War II came,he talked the Red Cross into giving him a job. He took the regular training.He marched and drilled along with the other soldiers.Few knew that he was legless.This was the true story of Hank Viscardi,a man without legs. Question: When Hank marched and drilled along with the other soldiers,he - did everything the other soldiers did - did most of the things the other soldiers did - did some of the things the other soldiers did - took some special training
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did everything the other soldiers did