Article: A new study suggests that early exposure to germs strengthens the immune system. That means letting children get a little dirty might be good for their health later in life. The study involved laboratory mice. It found that adult mice raised in a germ-free environment were more likely to develop allergies, asthma and other autoimmune disorders. There are more than eighty disorders where cells that normally defend the body instead attack tissues and organs. Richard Blumberg,who led the study,is a professor at Harvard Medical School in Boston,Massachusetts. He says,in 1989,medical researchers who sought to explain these diseases, first discovered that the increasing use of antibacterial soaps and other products, especially early in life, could weaken immune systems. Now, Dr. Blumberg and his team have what is the first biological evidence to link early exposure to germs to stronger adult immune systems. They say this exposure could prevent the development of some autoimmune diseases. In the adult germ-free mice, they found that inflammation in the lungs and colon was caused by so-called killer T cells. These normally fight infection. But they became overactive and targeted healthy tissue--an autoimmune condition seen in asthma and a disease called ulcerative colitis . Dr. Blumberg says the mice raised in a normal environment did not have the same reaction. He says their immune systems had been "educated" by early exposure to germs. Rates of autoimmune disorders are rising worldwide, but mostly in wealthier, industrialized countries. According to Dr. Blumberg, it might be high time that people were warned to be more careful with the early use of antibiotics and the prescription from their doctors. Rob Dunn is a professor of ecology and evolutionary biology at North Carolina State University in Raleigh. He says the new study does not mean people should stop washing. "Wash your hands , but don't do it with antibacterial soap. Let your kids play in a reasonable amount of dirt and get outside and get... Question: Who first found immune systems might get harmed by overly using antibacterial products? Yes or no, is the answer "Medical researchers who tried to explain autoimmune disorders."?
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Article: Very few people were coming to eat at the White Rose Restaurant, and its owner did not know what to do. The price was reasonable and the food was of good quality, but nobody seemed to want to eat there. Then he did something that changed all that, and in a few weeks his restaurant is always full of men with their lady friends. Whenever a gentleman came in with a lady, a smiling waiter gave each of them a menu , The menu looked exactly the same on the outside, but there was an important difference inside. The menu that the waiter gave to the man supplied the correct price for each dish and each bottle of wine. while the menu that he gave to the lady supplied a much higher price! So when the man calmly ordered dish after dish and wine after wine, the lady thought he was much more generous than he really was. Question: Why didn't people come to the White Rose Restaurant to eat at first? Yes or no, is the answer "The passage didn't mention."?
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Article: In the earliest stages of man's development he had no more need of money than animals have. He was content with very simple forms of shelter, made his own rough tools and weapons and could provide food and clothing for himself and his family from natural materials around him. As he became more civilized, however, he began to want better shelter, more efficient tools and weapons, and more comfortable and more lasting clothing than could be provided by his own neighborhood or by the work of his own unskilled hands. For these things he had to turn to the skilled people such as smiths, leather workers or carpenters. It was then that the question of payment arose. At first he got what he wanted by a simple process of exchange. The smith who had not the time to look after land or cattle was glad to take meat or grain from the farmer in exchange for an axe or a plough . But as more and more goods which had no fixed exchange value came on the market, exchange became too complicated to be satisfactory. Another problem arose when those who made things wanted to get stocks of wood or leather, or iron, but had nothing to offer in exchange until their finished goods were ready. Thus the difficulties of exchange led by degree to the invention of money. In some countries easily handled things like seeds or shells were given a certain value and farmer, instead of paying the smith for a new axe by giving him some meat or grain, gave him so many shells. If the smith had any shells left when he had bought his food, he could get stocks of the raw materials of his trade. In some countries quite large things such as cows or camels or even big flat stones were used for trade. Later, pieces of metal, bearing values according to the rarity of the metal and the size of the pieces, or coins were used. Money as we know it had arrived. Question: What was used for trade according to the text? Yes or no, is the answer "Shells"?
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Article: What are you reading? (A3) How do your reading habits compare to those of students of a similar age? We ran a poll to discover what, when, where and why teens read. Literary greats(A4-7) People have been telling stories for centuries. We profile eight authors, whose work has made a great contribution both to literature and the world as a whole. Have you read any of their books? Teen reading(A8-10) Not all books are written by adults for adults. The market for books aimed at young adults is very strong and many new titles are published each year. Some of them are even written by teenagers. Science fiction (A11) Have you ever thought what it would be like to travel in space or meet _ ? Jules Verne and Douglas Adams did. It's time to explore the world of science fiction, where anything and everything can happen. Horror(A12) You'll want to sleep with the light on after reading a story by Edgar Allan Poe or Stephen King. They are two of the finest fiction writers. Get ready for unpleasant deaths and frightening ghosts . _ (A13) Don't have time to read a whole book? Then why not spend a few minutes with a book of poetry? We have selected some poems that celebrate the winter season--white snow, cold weather and Christmas. Past and present(A14) Over the centuries, stories have been written on all kinds of things. Find out about the development of paper and printing----and what books will look like in the future. Join in the fun(A15--16) Reading is enjoyed by almost everyone. Here are some activities you can do to make it even more fun. You can also try our special literature quiz. Question: Which of the following can be put into the blank before(A13)? Yes or no, is the answer "Winter poems"?
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