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　　Chuck Wall teaches management and human relations at Bakersfield College．He walked into class one day and told his students that their h　　1　　 was to perform one act of random(任意的)kindness．His students did not understand the assignment(任务), but the professor would not answer their questions．He e　　2　　 his students to find it out for themselves．

　　One week later, the students entered the classroom excited to s　　3　　 their stories．One student told of distributing blankets to the homeless, another had contacted a long, lost friend, and another student r　　4　　 that he had helped a dog to find its owner．Students were energized(激励)by the homework assignment and wanted other people to be kind too．W　　5　　the support of local businesses, the students made stickers to put on cars that invited people to do something k　　6　　 for others．They sold the stickers and decided to donate the money to a center for the blind –not surprising as Professor Wall is blind．Since then, s　　7　　 kindness activities have been organized in schools all over the world．Many schools organize a Random Acts of Kindness Week, a　　8　　November 13, to celebrate World Kindness Day．Some schools use each day of Random Acts of Kindness Week to performd　　9　　 kind acts, such as making a new friend, helping someone, doing community service, or raising money for a charity．Students learn to c　　10　　other people and think about how small actions can make the world a better place．

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　　Nogoba was a cavegirl．She lived in a cave with about 40 other people．Cavepeople lived in big groups to help each other．Their l　　1　　 were very dangerous．There were many w　　2　　

　　animals near the caves－lions, tigers, bears and elephants．

　　The cavemen hunted．They k　　3　　 the animals for food．The children's jobs were dangerous, too．Nogoba and her friends went to the river every day to get w　　4　　．Sometimes, the river was very deep．S　　5　　, there were animals near the river．

　　For many months of the y　　6　　, Nogoba was cold．There was ice and snow everywhere．It was difficult to be w　　7　　．The children sometimes went to sleep by the fire．Sometimes they were too n　　8　　 the fire．

　　Sometimes Nogoba and her friends went to f　　9　　 fruit and nuts to eat．Sometimes the fruit and nuts were poisonous and everyone became i　　10　　．There weren't any cave doctors or cave hospitals!