Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.
Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.
Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers’ pulses（脉搏）went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don’t know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day’s garbage.
One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.During REM sleep, a person’s breathing and heartbeat ________.
| A．stop | B．increase | C．decrease | D．stay the same |
Which word in paragraph（段落）3 means “colorful and lively”?
| A．easier | B．empty | C．vivid | D．quickly |
Which paragraph tells what happens when people don’t get enough sleep?
| A．1 | B．2 | C．3 | D．4 |
What is the main idea of the article?
| A．REM sleep helps the brain grow. |
| B．REM sleep has been watched and recorded by scientists. |
| C．REM sleep is a time to empty the day’s garbage. |
| D．REM sleep is an active time when the body is hard at work. |
You can decide from the article that REM sleep ________.
| A．has a restful effect on people |
| B．can be avoided with lots of sleep |
| C．is something that all people experience |
| D．is something that all scientists agree on |
Because earthquakes happen without warning, it’s important to take steps now to prepare. Because you don’t know where you will be when an earthquake happens, prepare some supplies for your home, workplace, and car.
1. Water.
A person needs at least 1/2 gallon of water daily just for drinking. Store at least1 gallon of water per person per day and be prepared for a 72-hour period. It’s suggested that you buy bottled water. Keep bottled water in its original container and do not open it until you need to use it. Also, do check the “use by” date.
2. Food.
It’s always a practical idea to keep a supply of non-perishable(不易腐烂的) food on hand. Have an enough supply of canned food, dried milk, dried fruits, non-salted nuts and canned juices for at least 72 hours.
3. Flashlights and spare batteries.
Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure that no gas leaks.
Prepare a battery –powered radio and spare batteries. Most telephones will be out of order, so radios will be your best source of information.
4. Clothes.
If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.You should prepare all of the following except _______________.
| A．canned juices |
| B．dried fruits |
| C．fresh vegetables |
| D．dried milk |
If you live in a cold place, you should prepare _______________ .
| A．some warm clothes and bedding supplies |
| B．some hot water |
| C．some batteries |
| D．some flashlights |
According to the article we know that _________________.
| A．clothes are used to protect your head |
| B．a telephone is the most important prepared thing |
| C．flashlights but not matches are first used after earthquakes |
| D．we need to prepare some supplies only at home |
America is a mobile society. Friendships between Americans can be close and real, yet disappear soon. They don’t feel hurt. If the same two people meet again, even years later, they pick up the friendship. This can be quite difficult for us Chinese to understand. Friendships between us develop more slowly but may become lifelong feelings, extending（延伸）deeply into both families.
There is another difficult point for us to understand. Although Americans treat friends warmly in their personal everyday lives, they don’t show their politeness to them if it requires a great deal of time. But in China, we are usually generous with our time. We, as hosts, will appear at an airport even in the middle of the night to meet a friend. We may take days off from our work to act as guides to our friends: It is opposite in America, Americans can not manage the time to do a great deal with a visitor outside their daily plans. They will probably expect the visitors to get themselves from the airport to the hotels. And they expect the visitors will phone them from there. Once the visitors arrive at their homes, the welcome will be full, warm and real.
For Americans, it is often considered more friendly to invite a friend to their homes than to restaurants, except for business matters. Americans are ready to receive us foreigners at their homes, share their holidays, and their home life. So accept their hospitality（好客）at home and enjoy your visit in America!The underlined phrase “pick up” in Paragraph 1 may mean “_______”.
| A．keep out |
| B．give up |
| C．pay no attention to |
| D．continue |
Which of the following is the typical way of American hospitality?
| A．Treating friends at home. |
| B．Taking days off to be with friends. |
| C．Meeting friends at the airport at midnight. |
| D．Sharing everything they have. |
Which of the following statements in True according to the passage?
| A．Americans are always generous with their time. |
| B．Americans don’t feel hurt if their friendships disappear soon. |
| C．Chinese friendships develop more slowly but will never disappear. |
| D．Chinese friendships are more sincere than American friendships. |
This passage is most probably written for.
| A．American students |
| B．Chinese students |
| C．Chinese visitors to America |
| D．American visitors to China |
All the wisdom of the times, all the stories that have delighted mankind for centuries, are easily and cheaply available to all of us in books, but we must know how to make use of this treasure. The unluckiest people in the world are those who have never discovered how satisfying it is to read good books.
I’m very interested in people and finding out about them. Some of the most amazing people I’ve met could only be found in a writer’s imagination, then in his book, and then, again, in my imagination. I’ve found in books new friends and new worlds.
Reading is fun, not because the writer is telling you something, but because it makes your mind work. Your own imagination works along with the writer’s or even goes beyond his. Your experience, compared with his, brings you to the same or different conclusions, and your ideas develop as you understand his.
Every book stands by itself, like a one-family house, but books in a library are like houses in a city. Although they are separate(分开的), in some way they are connected with each other. The same ideas, or related(相关的) ones, appear in different places; the human problems that repeat themselves in life repeat themselves in books, but with different solutions(解决方法) according to different writings at different times. Books influence each other. They connect the past, the present and the future and have their own generations (age groups), like families. Wherever you start reading, you connect yourself with one of the families of ideas, and in the end, you not only find out about the world and the people in it, you find out about yourself, too.
Reading can only be fun if you expect it to be. If you concentrate on(专注于) books somebody tells you “ought” to read, you probably won’ t have fun. But if you put down a book you don’t like and try another till you find one that means something to you, and then relax with it, you will almost certainly have a good time — and if you become, as a result of reading, better, wiser, kinder, or more gentle, you won’t suffer during the process.Which of the following ideas may the writer of this article agree with?
| A．You will never meet amazing people in your life unless you read. |
| B．You think actively instead of getting facts passively（被动地）when reading. |
| C．You will get much delight from any book that you are told to read. |
| D．You can relax yourself by reading because it involves little thinking. |
What can we learn from Paragraph 4?
| A．We can often find something connected with ourselves in books. |
| B．Different writings at different times share the same characteristics. |
| C．The same problems will appear in different books with similar solutions. |
| D．Reading books which are written for your generation is more helpful to you. |
What’s the writer’s purpose of writing this article?
| A．To advise us to enjoy ourselves by reading. |
| B．To encourage us to make full use of libraries. |
| C．To encourage us to find out solutions in books. |
| D．To advise us to discuss books with other people. |
America is a mobile society. Friendships between Americans can be close and real, yet disappear soon. They don’t feel hurt. If the same two people meet again, even years later, they pick up the friendship. This can be quite difficult for us Chinese to understand. Friendships between us develop more slowly but may become lifelong feelings, extending（延伸）deeply into both families.
There is another difficult point for us to understand. Although Americans treat friends warmly in their personal everyday lives, they don’t show their politeness to them if it requires a great deal of time. But in China, we are usually generous with our time. We, as hosts, will appear at an airport even in the middle of the night to meet a friend. We may take days off from our work to act as guides to our friends: It is opposite in America, Americans can not manage the time to do a great deal with a visitor outside their daily plans. They will probably expect the visitors to get themselves from the airport to the hotels. And they expect the visitors will phone them from there. Once the visitors arrive at their homes, the welcome will be full, warm and real.
For Americans, it is often considered more friendly to invite a friend to their homes than to restaurants, except for business matters. Americans are ready to receive us foreigners at their homes, share their holidays, and their home life. So accept their hospitality（好客）at home and enjoy your visit in America!The underlined phrase “pick up” in Paragraph 1 may mean “_______”.
| A．keep out |
| B．give up |
| C．pay no attention to |
| D．continue |
Which of the following is the typical way of American hospitality?
| A．Treating friends at home. |
| B．Taking days off to be with friends. |
| C．Meeting friends at the airport at midnight. |
| D．Sharing everything they have. |
Which of the following statements in True according to the passage?
| A．Americans are always generous with their time. |
| B．Americans don’t feel hurt if their friendships disappear soon. |
| C．Chinese friendships develop more slowly but will never disappear. |
| D．Chinese friendships are more sincere than American friendships. |
This passage is most probably written for.
| A．American students |
| B．Chinese students |
| C．Chinese visitors to America |
| D．American visitors to China |
All the wisdom of the times, all the stories that have delighted mankind for centuries, are easily and cheaply available to all of us in books, but we must know how to make use of this treasure. The unluckiest people in the world are those who have never discovered how satisfying it is to read good books.
I’m very interested in people and finding out about them. Some of the most amazing people I’ve met could only be found in a writer’s imagination, then in his book, and then, again, in my imagination. I’ve found in books new friends and new worlds.
Reading is fun, not because the writer is telling you something, but because it makes your mind work. Your own imagination works along with the writer’s or even goes beyond his. Your experience, compared with his, brings you to the same or different conclusions, and your ideas develop as you understand his.
Every book stands by itself, like a one-family house, but books in a library are like houses in a city. Although they are separate(分开的), in some way they are connected with each other. The same ideas, or related(相关的) ones, appear in different places; the human problems that repeat themselves in life repeat themselves in books, but with different solutions(解决方法) according to different writings at different times. Books influence each other. They connect the past, the present and the future and have their own generations (age groups), like families. Wherever you start reading, you connect yourself with one of the families of ideas, and in the end, you not only find out about the world and the people in it, you find out about yourself, too.
Reading can only be fun if you expect it to be. If you concentrate on(专注于) books somebody tells you “ought” to read, you probably won’ t have fun. But if you put down a book you don’t like and try another till you find one that means something to you, and then relax with it, you will almost certainly have a good time — and if you become, as a result of reading, better, wiser, kinder, or more gentle, you won’t suffer during the process.Which of the following ideas may the writer of this article agree with?
| A．You will never meet amazing people in your life unless you read. |
| B．You think actively instead of getting facts passively（被动地）when reading. |
| C．You will get much delight from any book that you are told to read. |
| D．You can relax yourself by reading because it involves little thinking. |
What can we learn from Paragraph 4?
| A．We can often find something connected with ourselves in books. |
| B．Different writings at different times share the same characteristics. |
| C．The same problems will appear in different books with similar solutions. |
| D．Reading books which are written for your generation is more helpful to you. |
What’s the writer’s purpose of writing this article?
| A．To advise us to enjoy ourselves by reading. |
| B．To encourage us to make full use of libraries. |
| C．To encourage us to find out solutions in books. |
| D．To advise us to discuss books with other people. |