A study finds that not enough morning light causes teenagers not to get enough sleep at night. “As teenagers spend more time indoors, they miss necessary morning light. Day light is needed to keep the balance of the body’s 24-hour biological system (生物系统), which regulates (调节) body temperature and sleep styles,” reports Dr. Mariana Figueiro. “These teenagers who receive little morning light are going to bed later, getting less sleep and doing badly in tests. They are more likely to fail in their exams.”
In the study, Dr. Figueiro asked 11 students in Grade 8 to wear special glasses to prevent blue morning light from reaching their eyes. At the end of the 5-day study she found that they fell asleep 30 minutes later than usual.
Throughout her research, Dr. Figueiro has been very worried about teenagers going to bed too late. The problem is that today’s schools require teenagers to be in school very early in the morning. These students are likely to miss the morning light because they often go to school before the sun is up or as it’s just rising.
Furthermore (此外), the schools are not likely to provide enough electric light to keep the balance of this biological system. Our biological system is much more sensitive (敏感的) to blue light. Therefore, having lots of light in the classroom does not make sure that there is enough light to keep our biological system balanced.

1.
Which of the following is the result of the study?
1. A.
  Blue light in the morning harms the biological system.
2. B.
  Not enough morning light keeps teenagers sleep less.
3. C.
  Not getting more light in the morning make teenagers happy.
4. D.
  Not enough sleep makes teenagers fail in tests.
2.
We know from the passage that morning light __________.
1. A.
  has the same effects as afternoon light
2. B.
  may change studying habits of teenagers
3. C.
  is important to children’s biological system
4. D.
  has no effect on students’ tests
3.
What’s the problem of the students according to the study?
1. A.
  There are not enough electric lights in the classroom.
2. B.
  Being in school early affects their study habits.
3. C.
  They have to go to bed very early to have enough sleep.
4. D.
  They go to school too early to get enough morning light.

A lift is wonderful. It is really only a small room. Rooms usually stay in one place. Lifts travel up and down all day long.
Sometimes a worker stands in the lift. He or she operates it up and down. In modern lifts there is no worker. The people walk in. They know what floor they want. They push a button and the lift goes to that floor. It is all very fast and easy.
Lifts are very important to us. Why? Think about a tall building. Maybe it has twenty floors. Maybe it has fifty or more. Who can walk up all the stairs? Maybe people can climb them one time. Can someone climb thirty floors to an office every day? Can small children walk up to their room on the twenty-fourth floor? Can their mother and father carry food up all those stairs? Of course not.
We can have high buildings because we have lifts. We could not have all the beautiful tall buildings in the world without lifts. They are really wonderful.

1.
Which of the following is true?
1. A.
  A modern lift has no buttons.
2. B.
  A modern lift has a worker to operate it.
3. C.
  A modern lift can go up and down with no worker in it.
4. D.
  A modern lift knows what floor people want.
2.
If you want to go to the floor you want, you_______.
1. A.
  ask for help
2. B.
  open the door of the lift
3. C.
  ring the bell
4. D.
  push the right button
3.
Why do people have to use lifts? Because________.
1. A.
  they have tall buildings
2. B.
  they can't walk up and down
3. C.
  old people and children need them
4. D.
  lifts are wonderful

A lift is wonderful. It is really only a small room. Rooms usually stay in one place. Lifts travel up and down all day long.
Sometimes a worker stands in the lift. He or she operates it up and down. In modern lifts there is no worker. The people walk in. They know what floor they want. They push a button and the lift goes to that floor. It is all very fast and easy.
Lifts are very important to us. Why? Think about a tall building. Maybe it has twenty floors. Maybe it has fifty or more. Who can walk up all the stairs? Maybe people can climb them one time. Can someone climb thirty floors to an office every day? Can small children walk up to their room on the twenty-fourth floor? Can their mother and father carry food up all those stairs? Of course not.
We can have high buildings because we have lifts. We could not have all the beautiful tall buildings in the world without lifts. They are really wonderful.
【小题1】Which of the following is true?

A．A modern lift has no buttons.

B．A modern lift has a worker to operate it.

C．A modern lift can go up and down with no worker in it.

D．A modern lift knows what floor people want.

【小题2】If you want to go to the floor you want, you_______.

A．ask for help	B．open the door of the lift
C．ring the bell	D．push the right button

【小题3】Why do people have to use lifts? Because________.

A．they have tall buildings

B．they can't walk up and down

C．old people and children need them

D．lifts are wonderful

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What do you want to be when you grow up? A teacher? A doctor? How about an ice-cream taster?
Yes, there really is a job where you can get paid to taste ice cream. Just ask John Harrison, an “Official Taste Tester” for the past 2l years. Harrison’s job has been responsible for approving（批准）large numbers of the sweet ice cream – as well as for developing over 15 flavors（味道）.
Some people think that it would be easy to do this job; after all, you just have to like ice cream, right? No – there’s more to the job than that, says Harrison, who has a degree in chemistry. He points out that a dairy or food-science degree would be very useful to someone wanting a job in this “cool field”.
In a typical morning on the job, Harrison tastes and grades 60 ice-cream samples. He lets the ice cream warm up to about 12^oF. Harrison explains, “You get more flavor from warmer ice cream, which is why some kids like to stir it, creating ice-cream soup.”
While the ice cream warms up, Harrison looks over the samples and grades each one on its appearance. “Tasting begins with the eyes,” he explains. He checks to see if the ice cream is attractive and asks himself, “Does the product have the colour expected from that flavor?” Next it’s time to taste!
Continuing to think up new ideas, try out new flavors and test samples from so many kinds of ice cream each day keeps Harrison busy but happy – working at one cool job.
【小题1】What is John Harrison’s job?

A．An officer.	B．An ice-cream taster.
C．A chemist.	D．An ice-cream producer.

【小题2】According to John Harrison, what is useful to get a job in “cool field”?

A．To just like ice cream.

B．To find out new flavors each day.

C．To have new ideas every day.

D．To have a degree in food-science.

【小题3】What does Harrison do first when testing ice cream?

A．He smells it.	B．He lets it warm up.
C．He tastes its flavor.	D．He examines its colour.

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A student newspaper reports that most students go to sleep at 1:30 am. Even if that’s an overstatement (夸张), it’s close to the truth. Scientists say teens should sleep nine hours each night. But that’s hard. Some are even “pulling all-nighters” (开夜车). These students must hand in their homework the next day but they haven’t done it. In the morning they don’t look healthy and you can tell who’s been doing it. One of my classmates did a survey on the topic. She found that most kids pull all-nighters to finish homework, but some do it for other reasons, such as playing computer games!
Maybe our lack(缺乏) of sleep is because of laziness — I think I’m a rather lazy student — or maybe it’s because we have too much to do in American high schools. I usually go to bed around midnight. If I stayed up past 1:30 am, I wouldn’t get any work done. I’d be falling asleep at my computer. My classes begin at 7:30 am. I’m partly awake in my first class. By the second, I’m a little sleepy. By my third class, I’m sleepy. By midday I’m finally fully awake. But by 3:00 pm, I’m slowing down again. Yet I get more sleep than usual students.
Most American high schools seem to have a similar(相似的) problem with sleepy students. High school classes start at 7:30 am, so students have to get up one and a half hours before that to get ready and catch the bus. It’s believed that lack of sleep can be bad for both grades and health. Some schools are paying attention. Classes in those schools start at 8:30 am.
【小题1】What does the underlined sentence “it’s close to the truth” mean?

A．It doesn’t tell the truth.	B．It is quite true.
C．It is impossible.	D．I don’t think it’s right.

【小题2】Why do most of the teens have to stay up late?

A．They play computer games.	B．They watch videos late.
C．They have to do a lot of housework.	D．They have to do a lot of homework.

【小题3】When do students in most American high schools have to get up?

A．At 7:30 am.

B．At 6:00 am.

C．At 9:00 am.

D．At about 7:00 am.

【小题4】Which of the following is TRUE according to the reading?

A．The writer usually stays up past 1:30 am.

B．The writer usually goes to bed around midnight.

C．The writer usually does a survey.

D．Many American students don’t get enough sleep, so they can have high grades.

【小题5】What’s the main idea of the passage?

A．Something has to be done to solve the problem of students’ lack of sleep.

B．Many American high school students are sleepy in class.

C．Many kids have too much homework to do.

D．Students can’t play computer games.

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同步练习册答案

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高中

初中

小学

Which of the following is the result of the study?

We know from the passage that morning light __________.

What’s the problem of the students according to the study?

Which of the following is true?

If you want to go to the floor you want, you_______.

Why do people have to use lifts? Because________.