For millions of years before the appearance of the electric light, shift work, allnight cable TV and the Internet, Earth’s creatures evolved on a planet with predictable and reassuring 24-hour rhythms. Our biological clocks are set for this daily cycle. Simply put, our bodies want to sleep at night and be awake during the day. Most women and men need between eight and eight and a half hours of sleep a night to function properly throughout their lives. (Contrary to popular belief, humans don’t need less sleep as they age.)
But on average, Americans sleep only about seven and a half hours per night, a marked drop from the nine hours they averaged in 1910. What’s worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that’s not nearly enough.
Finding ways to get more and better Sleep can be a challenge. Scientists have identified more than 80 different sleep disorders. Some sleeping disorders are genetic. But many problems are caused by staying up late and sleeping in, by traveling frequently between time zones or by working nights. Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleep disorders are often diagnosed as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome actually have treatable sleep disorders. "Before we do anything else, we look at their sleep, "Jones says.
Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto is ’Sleep defensively’," says Mary Carskadon of Brown University. She says people need to carve out sufficient time to sleep, even if it means giving up other things. Sleep routines—like going to bed and getting up at the same time every day—are important. Pre-bedtime activities also make a difference. As with Elaner, who used to suffer from sleeplessness, a few lifestyle changes—avoiding stimulants and late meals, exercising hours before bedtime, relaxing with a hot bath—yield better sleep.
What is TRUE of human sleep

A:Most people need less sleep when they grow older. B:Most people need seven and a half hours of sleep every night. C:On average, people in the U.S. today sleep less per night than they used to. D:For most people, less than six hours of sleep on a typical work night is enoug

Text 4

What is TRUE of human sleep

A:Most people need less sleep when they grow older. B:Most people need seven and a half hours of sleep every night. C:On average, people in the U.S. today sleep less per night than they used to. D:For most people, less than six hours of sleep on a typical work night is enough.

A
It is estimated that some seven hundred million people about half the world’s population are un able to read and write, and there are probably two hundred and fifty million more whose level of attainment(造诣、成就)is so slight that it barely qualifies a literacy(识字).
Recently the attack on illiteracy has been stepped up. A world plan has been drawn up by a committee of UNESCO experts in Paris, as part of the United Nations Development Decade, and an international conference on the subject has also been held. UNESCO stresses that functional literacy is the aim. People must learn the basic skills of responsible citizenship: the ability to read notices, newspapers, timetables, letters, price lists, to keep simple records and accounts, to sort out the significance of the information gathered, and to fill in forms.
The major areas of illiteracy are in Asia, and Central and South America. In Africa there are at least one hundred million illiterates, making up eighty to eighty-five per cent of the total population. In Europe the figure is about twenty-four million, most of them is Southern Europe, with Spain, Italy, Portugal, and Yugoslavia heading the list (the United Kingdom has about seven hundred thousand).

According to the estimate, the illiterate population in the world is（）

A:two hundred and fifty million B:one hundred million C:about half of the total population in the world D:seven thousand million

? ?For millions of years before the appearance of the electric light, shift work, all-night cable TV and the Internet, Earth’s creatures evolved on a planet with predictable and reassuring 24-hour rhythms. Our biological clocks are set for this daily cycle. ?Simply put, our bodies want to sleep at night and be awake during the day. Most women and men need between eight and eight and a half hours of sleep a night to function properly throughout their lives. (Contrary to popular belief, humans don’t need less sleep as they age.)
? ?But in average, Americans sleep only about seven and a half hours per night, a marked drop from the nine hours they averaged in 1910. What’s worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that’s not nearly enough.
? ?Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders. Some sleeping disorders are genetic. But many problems are caused by staying up late and sleeping in, by traveling frequently between time zones or by working nights. Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleep disorders are often diagnosed as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.
? ?Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto (座右铭) is ’Sleep defensively’ ," says Mary Carskadon of Brown University. She says people need to carve out sufficient time to sleep, even if it means giving up other things. Sleep routines—like going to bed and getting up at the same time every day—are important. Pre-bedtime activities also make a difference. As with Elaner, who used to suffer from sleeplessness, a few lifestyle changes—avoiding stimulants and late meals, exercising hours before bedtime, relaxing with a hot bath—yield better sleep.

What is TRUE of human sleep?

A:Most people need less sleep when they grow older. B:Most people need seven and a half hours of sleep every night. C:On average, people in the U. S today sleep less per night than they used to. D:For most people, less than six hours of sleep on a typical work night is enough.

Jatenderpal Singh Bhullar, 25, is a guardsman in Britain. On Dec 11, 2012, he became the first Indian soldier to parade outside Buckingham Palace. He said wearing a turban instead of the famous bearskin was the "best moment of his life". The historical day came as the UK’s 2011 Census was published. It shows that nearly one in seven of the population in 2011 were foreign-born. The increase in the number of immigrants in the country is especially obvious in London. For the first time in history fewer than half the population of London described themselves as " white British". The top source of new migrants to the country is India. Many other immigrants are from Poland, Pakistan, Ireland and Germany. One major reason for the explosion in the foreign-born population is the accession of 12 countries in central and eastern Europe to the EU, giving them the right to live and work in the UK, said the Office for National Statistics, which was responsible for the census. For many immigrants, the UK tends to be a good place for life and work. Krissy Meyer, 25, moved to Nottingham from Germany in 2007. "The UK is a great place to live because everyone is so sociable. Apart from the heavy drinking, I love the outgoing lifestyle," she told The Sun. The census results also suggested the English language could be a barrier for immigrants trying to integrate into British society. In 91 percent of households, English is the main language spoken. However, in four percent of British families, no one is brought up speaking English. Britain needs to do more to help integrate its immigrant population, the Labor leader Ed Miliband said in a speech in London on Dec 14, 2012. The future Labor government would make proficiency in the English language a key priority, seeking to achieve what he calls a "connected nation" rather than a "segregated one". "We can only converse if we can speak the same language. So if we are going to build One Nation, we need to start with everyone in Britain knowing how to speak English," he said.The 2011 census results shows that ______.

A:more than one in seven of the population in 2011 were foreign-bom B:half the population of London described themselves as "white British" C:English can be a bamer for immigrants trying to integrate into British society D:only in four percent of British families, children are brought up speaking English

Jatenderpal Singh Bhullar, 25, is a guardsman in Britain. On Dec 11, 2012, he became the first Indian soldier to parade outside Buckingham Palace. He said wearing a turban instead of the famous bearskin was the "best moment of his life". The historical day came as the UK’s 2011 Census was published. It shows that nearly one in seven of the population in 2011 were foreign-born. The increase in the number of immigrants in the country is especially obvious in London. For the first time in history fewer than half the population of London described themselves as " white British". The top source of new migrants to the country is India. Many other immigrants are from Poland, Pakistan, Ireland and Germany. One major reason for the explosion in the foreign-born population is the accession of 12 countries in central and eastern Europe to the EU, giving them the right to live and work in the UK, said the Office for National Statistics, which was responsible for the census. For many immigrants, the UK tends to be a good place for life and work. Krissy Meyer, 25, moved to Nottingham from Germany in 2007. "The UK is a great place to live because everyone is so sociable. Apart from the heavy drinking, I love the outgoing lifestyle," she told The Sun. The census results also suggested the English language could be a barrier for immigrants trying to integrate into British society. In 91 percent of households, English is the main language spoken. However, in four percent of British families, no one is brought up speaking English. Britain needs to do more to help integrate its immigrant population, the Labor leader Ed Miliband said in a speech in London on Dec 14, 2012. The future Labor government would make proficiency in the English language a key priority, seeking to achieve what he calls a "connected nation" rather than a "segregated one". "We can only converse if we can speak the same language. So if we are going to build One Nation, we need to start with everyone in Britain knowing how to speak English," he said.The 2011 census results shows that ______.

A:more than one in seven of the population in 2011 were foreign-bom B:half the population of London described themselves as "white British" C:English can be a bamer for immigrants trying to integrate into British society D:only in four percent of British families, children are brought up speaking English

Jatenderpal Singh Bhullar, 25, is a guardsman in Britain. On Dec 11, 2012, he became the first Indian soldier to parade outside Buckingham Palace. He said wearing a turban instead of the famous bearskin was the "best moment of his life". The historical day came as the UK’s 2011 Census was published. It shows that nearly one in seven of the population in 2011 were foreign-born. The increase in the number of immigrants in the country is especially obvious in London. For the first time in history fewer than half the population of London described themselves as " white British". The top source of new migrants to the country is India. Many other immigrants are from Poland, Pakistan, Ireland and Germany. One major reason for the explosion in the foreign-born population is the accession of 12 countries in central and eastern Europe to the EU, giving them the right to live and work in the UK, said the Office for National Statistics, which was responsible for the census. For many immigrants, the UK tends to be a good place for life and work. Krissy Meyer, 25, moved to Nottingham from Germany in 2007. "The UK is a great place to live because everyone is so sociable. Apart from the heavy drinking, I love the outgoing lifestyle," she told The Sun. The census results also suggested the English language could be a barrier for immigrants trying to integrate into British society. In 91 percent of households, English is the main language spoken. However, in four percent of British families, no one is brought up speaking English. Britain needs to do more to help integrate its immigrant population, the Labor leader Ed Miliband said in a speech in London on Dec 14, 2012. The future Labor government would make proficiency in the English language a key priority, seeking to achieve what he calls a "connected nation" rather than a "segregated one". "We can only converse if we can speak the same language. So if we are going to build One Nation, we need to start with everyone in Britain knowing how to speak English," he said.The 2011 census results shows that ______.

A:more than one in seven of the population in 2011 were foreign-bom B:half the population of London described themselves as "white British" C:English can be a bamer for immigrants trying to integrate into British society D:only in four percent of British families, children are brought up speaking English