The vitamins necessary for a healthy body are normally supplied by a good mixed diet, including a variety of fruits and green vegetables. It is only when people try to live on a very restricted diet, say that when trying to lose weight, that it is necessary to make special provisions to supply the missing vitamins.
　　An example of the dangers of a restricted diet may be seen in the disease known as “beri-beri”, which used to make large numbers of Eastern people who lived mainly on rice suffer. In the early years of last century, a Dutch scientist named Eijkman was trying to discover the cause of beri-beri. At first he thought it was transmitted（传播）by a germ（病菌）. He was working in a Japanese hospital, where the patients were fed on polished rice which had had the outer coverings removed from the grain. It was thought this would be easier for weak and sick people to digest.
　　Eijkman thought his germ theory was proved when he noticed the chickens in the hospital yard, which were fed on remains from the patients’ plates, were also showing signs of the disease. He then tried to separate the germ, which he thought was causing the disease, but his experiments were interrupted by a hospital official, who ordered that the rice without coverings, even though left over by the patients, was too good for chickens. It should be recooked for the patients, and the chickens should be fed on cheap, rough rice with the outer coverings still on the grain.
　　Eijkman noticed that the chickens began to recover on the new diet. He began to consider the possibility that eating unmilled rice（糙米）somehow prevented or cured beri-beri — even that a lack of some ingredient（成分）in the coverings may be the cause of the disease. Indeed this was the case. The element needed to prevent beri-beri was shortly afterwards separated from rice coverings and is now known as vitamin B. The milled rice, though more expensive, was in fact causing the disease the hospital was trying to cure. Nowadays, this terrible disease is much less common thanks to our knowledge of vitamins.
【小题1】According to the passage, a good mixed diet ________.

Towards the end of Middle English, a sudden change in pronunciation started, with vowels being pronounced shorter and shorter. From the 16th century the British had contact with people from around the world. This means that many new words and phrases entered the language. The invention of printing also meant that there was a common language in print. Books became cheaper and more people learned to read. Spelling and grammar became fixed and the dialect （方言）of London became the standard. In 1604, the first English dictionary was published.
The numbers of words in Early Modern English and Late Modern English differ. Late Modern English has a lot more words because of two main factors: firstly, the Industrial Revolution created a need for new words; secondly, the British Empire covered one quarter of the earth’s surface, and the English language took in foreign words from many countries.
From around 1600, the English colonization(殖民地化)of North America resulted in the creation of American English. Some English pronunciation and words froze when they reached America. In some ways, American English is more like the English of Shakespeare than modern British English. Some expressions that the British call “ Americanisms” are in fact original （原先的）British expressions that were preserved (保存) in the colonies but were lost in Britain. Spanish also had an influence on American English, with words like canyon, ranch, stampede and vigilante being examples of Spanish words that entered English. French words and West African words also influenced American English.
Today, American English is the most influential(有影响力的). But there are many other kinds of English around the world, including Australian English, New Zealand English, Canadian English, South African English , Indian English and Caribbean English. They have differences.
【小题1】What can we know from Paragraph 1?

This selection of books and guides offers insight to hidden charm in many favorite cities and destinations and gives you the knowledge to uncover unusual sights to see and places to visit. We hope you enjoy our choices and welcome your comments. Email your feedback to books@ gounusual. com.

The following are taken from these books. You will find much more information about these hotels in the books.
Kakslauttanen Hotel

It is the home of the famous Igloo（冰屋）Village with the unique glass and snow igloos and the world’s largest snow restaurant. In addition , their guests can enjoy the winter activities including watching the Northern Lights visible generally from late August to late April. Guests can sample the peace of sleeping in snow. Their glass igloos are fantastic for lying on your bed at night, watching the Northern Lights in the warm. You can enjoy cold or warm night sleep as required.
Art Hotel in Ronda

Beautifully situated in the oldest paved street of Ronda and surrounded by historic buildings, Art Hotel is decorated with original and historical artwork and atmospheric lighting. There is lots of fun and funky touches, e. g. lights and birds nesting in old basketballs, wall murals（壁画）of Michael Jackson , car tyres converted to occasional tables.
During your stay, all drinks, breakfast and the use of all facilities are included in the price of the room.
Otter Creek Tents
The tents are separated from the rest of the world by a quiet salt-water creek. A coconut plantation dating back to 1886, the secret location preserves the privacy and peace of guests, with the salt water of the creek keeping even the mosquitoes away.
Each tent sleeps 2 in a four-poster double bed and has a western style toilet and bathroom with running water and hot shower. The tents use the dining facilities of the charming “Elsewhere” beach houses and enjoy over a mile of the pristine（处于原始状态的）beach where one can still see the footprints of fishermen , and during the season , possibly the prints of sea turtles.
The Original Icehotel

“Imagine a hotel built from thousands of tons of snow and ice, and rebuilt every winter”--that is ICEHOTEL in northern Lapland, Sweden.
This is the original ICEHOTEL, first created in the early 1990s. It has become the global ambassador for this genre and now licenses ICEBARs around the world too. With 80 ＋ rooms, the property is a huge undertaking to be rebuilt every year, and their expertise inspired other similar properties in North America and elsewhere.
【小题1】People staying in Kakslauttanen Hotel can watch the Northern Lights EXCEPT in ________.

A good night’s sleep in the early years of life could be very important in preventing a child becoming obese, say scientists. Babies and pre-school children who sleep for less than ten hours a night are more likely to be overweight when they are older, research has found. Experts believe that those who do not get enough sleep are more likely to feel hungry and want more calorie-rich food during the day.
Former research has linked sleeping with obesity in adults and teenagers, but this is one of the first to look at very young children. Researchers from the Universities of Washington and California looked at the sleeping habits of almost 1,000 children under the age of five. They found those who had less than ten hours’ sleep were twice as likely to be overweight five years later.
Childhood obesity has doubled over the past 10 years. A quarter of secondary school pupils are now judged to be so overweight that their health is in danger. Experts believe sleep, or lack（缺乏）of it, could be a major cause of this. On average children are sleeping for an hour less than they did 30 years ago. Last year Chinese researchers looked at more than 5,000 youngsters and found that those who were able to catch up on （补充）sleep at the weekend were far less likely to get body weight problems. Scientists have also found a link between lack of sleep and diabetes（糖尿病）. Last year Canadian researchers discovered those who did not get seven or eight hours’ sleep a night were two and a half times more likely to become sick.
【小题1】The underlined word “obese” in the first paragraph may mean       .

Five years ago, David Smith wore an expensive suit to work every day. “I was a clothes addict,” he jokes. “I used to carry a fresh suit to work with me so I could change if my clothes got wrinkled.” Today David wears casual clothes—khaki pants and sports shirt—to the office. He hardly ever wears a necktie. “I’m working harder than ever,” David says, “and I need to feel comfortable.”
More and more companies are allowing their office workers to wear casual clothes to work. In the United States, the change from formal to casual office wear has been gradual. In the early 1990s, many companies allowed their employees to wear casual clothes on Friday, but only on Friday. This became known as “dress-down Friday” or “casual Friday”. “What started out as an extra one-day-a-week benefit for employees has really become an everyday thing.” said business consultant Maisly Jones.
Why have so many companies started allowing their employees to wear casual clothes? One reason is that it’s easier for a company to attract new employees if it has a casual dress code. “A lot of young people don’t want to dress up for work,” says the owner of a software company, “so it’s hard to hire people if you have a conservative dress code.” Another reason is that people seem happier and more productive when they are wearing comfortable clothes. In a study conducted by Levi Strauss Company, 85 percent of employers said that they believe that casual dress improves employee morale（士气）. Only 4 percent of employers said that casual dress has a negative effect on productivity. Supporters of casual office wear also argue that a casual dress code helps them save money. “Suits are expensive, if you have to wear one every day,” one person said. “For the same amount of money, you can buy a lot more casual clothes.”
【小题1】David Smith refers to himself as having been “a clothes addict,” because __________.