Article: Scientists say they now have proof to support the old-fashioned advice that it's best to sleep on a problem. They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day. Lead researcher Bob Stickgold at the Harvard Medical School said, "Sleep helps us draw rules from our experiences. It's like knowing the difference between dogs and cats even if it's hard to explain." The US research team studied how well students remembered connections between words and symbols , reports New Scientist. They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept. They found that people were better able to remember lists of related words after a night's sleep than after the same time spent awake during the day. They also found it easier to remember themes that the words had in common. But they forgot around one in four more themes if they had been awake. Prof. John Groeger, of Surrey University's Sleep Research Centre, said, "People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative value. " "We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with it all." Question: Which of the following may be easier to remember? Yes or no, is the answer "Words learnt before a good sleep"?
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Article: Koalas are found only in prefix = st1 /Australia. Even if called koala bear, this animal has nothing to do with the actual bear; it is not even a mammal , but a marsupial , like the kangaroo. Its closest living s are the wombats . A koala is about 60-80cm long and weighs 5-14kg. The name "koala" means "no drink", and refers to the koala's ability to go for days without water. Koalas get the water content they need from the eucalyptus leaves on which they feed. The koala is the only mammal with a digestive system that can feed only on eucalyptus leaves--incidentally, these leaves are highly poisonous if eaten by humans. One individual consumes about 5kg of eucalyptus leaves daily and it may never drink water! The koala is a _ mammal. They prefer to move around just after sunset, spending daytime sleeping in the fork of a tree. A koala spends sleeping 75% of its time. The eucalyptus leaves they eat are rich in fiber and poor in proteins and fats. The adult must detoxify leaves with energy expense, while fiber is hard to break down. Because of this poor diet, koalas save energy by sleeping most of the day, while their movements are very slow. Koalas only have one young per year. In summer, baby koalas are born about a month after mating. The female takes it with her mouth and places it into her poach. In 6 months, the young can get out and feed on leaves. There are probably around 2,000 to 8,000 wild koalas in Australiaat present. The extremely fine gray fur is the reason why koala has been heavily hunted in the past. Koalas are killed every year by dogs, cats, dingoes, eagles and owls. They also die of disease and accidents. Question: Koalas do not get poisoned when eating eucalyptus simply because of their _ . Yes or no, is the answer "digestive system"?
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Article: "Your homework is to collect sounds and take them down," Mrs. Olson said before class was over. She handed out sheets of paper shaped like giant ears. On his way home, Colin glared out of the school-bus window. Not fair, he thought. How could he collect enough sounds on his family's farm? If only he lived in the town. He got off the bus when it stopped at his mailbox. But he wasn't in the mood to wave as it drove away. "I'm home!"Colin called when he pushed open the gate. He threw his schoolbag down on a kitchen chair. "How was school?" His mother asked, walking in with his baby brother on her shoulder. "I've got homework," Colin complained. "Eat something before _ " His mother gave him the animal biscuits. Colin ate two tigers, three lions, and a seal, then drank some milk. Astrid, Colin's dog, woofed as Colin walked toward the barn .Her young dogs were yipping. Colin placed dog food into their pan. In the chicken house, Colin hurried two hens from their nests.He put their warm eggs into his jacket. The black cow napped in the sun. Colin woke her when he poured corn into her pan. "Moo, thank you!"she seemed to say. Colin put the eggs in the kitchen, then climbed to his tree house as usual. He could see Dad's beehives by the field. Six hives usually meant plenty of humming noise. But today he couldn't hear it over the chattering sound of the sparrows,How could a person think? "QUIET!"Colin shouted. Suddenly, he sat up straight. Cows mooed and young dogs yipped. Chickens crackled in their yard. When Astrid began woofing below, Colin smiled broadly. "I hear you!"he called. He hurried down from the tree. Question: What will Colin most probably do next? Yes or no, is the answer "Record the sounds."?
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Article: One day,four lawyers were riding their horses along a country road. There had been a rain. Water was dripping from the trees,and the grass was wet. They rode slowly,talking and laughing. Suddenly they heard some noises from the tree above them. "What is the matter?" asked the first lawyer. "Oh, it's only some old birds!" said the second lawyer. "The storm made one of the babies fall out of the nest. It is too young to fly, and the mother bird is very worried." "What a pity! It'll die down there in the grass," said the third lawyer. "It doesn't matter. It's only a bird," said the second lawyer. Then they rode on, talking and laughing as before. But the fourth lawyer, whose name was Abraham Lincoln, stopped. He got down from his horse and took the little one in his big warm hands. "Never mind, my _ ," said Mr. Lincoln. "I will put you back in your little nest." He climbed up the tree and put the bird softly into their warm little home. A few minutes later, Mr. Lincoln joined them again. His shoes were covered with mud and he was wet. Then the other three laughed at him. They thought it was foolish for a strong man to do so much just for a young bird. "Gentlemen," said Mr. Lincoln, "I could not sleep tonight if I had left the helpless bird in the grass." Later Abraham Lincoln became very famous as a lawyer. He also became the president of America. He was one of the greatest American presidents. Question: The reason why the mother bird was worried was that _ . Yes or no, is the answer "one of its babies fell out of the nest"?
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