The accident happened ________ a winter morning.

            A.at       B.on          C.in        D.of

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. 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. 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. 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.

In some western countries, many children do chores (家务) to get pocket money. They usually start to do this when they are ten years old.
School students have to do homework and study for tests.  They don’t have much free time on weekdays. They often do chores on weekends.
Young kids only do easy chores. So they don’t get much money. But that’s enough. Many of them only want to buy candy. And candy is cheap! They often help do the dishes, sweep the floor, or feed the pet cat or dog.
When they get older, they want to buy more and more things. They want things that are more expensive than candy. So they have to work harder! They often help their parents wash the family car, cut the grass, or cook meals.
Some jobs are a good way for kids to learn new things. For example, they can learn how to use a lawnmower ( 割草机) or how to cook. Of course, their parents help them at first.

1. 1.

   How do many children get pocket money in some Western countries?

   1. A.
      By studying hard.
   2. B.
      By doing chores at home.
   3. C.
      By doing part - time jobs.
   4. D.
      By asking their parents for it.
2. 2.

   Mary wants to get more pocket money to buy something expensive. She may _________

   1. A.
      do the dishes
   2. B.
      feed the pet cat
   3. C.
      cook meals
   4. D.
      sweep the floor
3. 3.

   Which of the following is not true?

   1. A.
      Young kids do easy chores because they can get much money from their parents.
   2. B.
      School students often do chores on Saturdays and Sundays.
   3. C.
      If kids get older and want something more expensive, they can help wash their family car.
   4. D.
      Kids can learn how to cook with the help of their parents.
4. 4.

   The passage mainly tells us how children in some Western countries_________

   1. A.
      find jobs
   2. B.
      get pocket money
   3. C.
      study at school
   4. D.
      do chores