Question

本題你將聽到一篇短文，讀兩遍,請(qǐng)從每個(gè)小題的三個(gè) 選項(xiàng)中，選出最恰當(dāng)?shù)囊豁?xiàng)。

（  ）16. It's difficult for students to get enough rest,because.

   A. they spend much time playing

   B. they have many after-school classes

   C. they have much homework 

（  ）17. How many hours of sleep do teenagers usually need?

   A. More than seven hours.

   B. More than eight hours.

   C. More than nine hours.

（  ）18. Who did the survey of kids aged between 8 and 13?

   A. Some Chinese scientists.

   B. Some American scientists.

   C. Some Japanese scientists.

（  ）19. If kids don't get enough sleep,they may become

   A. excited   B. fat   C. healthy 

（  ）20. What shouldn’t teenagers be allowed to do?

   A. Eat too much junk food.

   B. Have too much homework.

   C. Do housework.

Answer 1

16—20 CCBBA

本題你將聽到一篇短文，讀兩遍，請(qǐng)從每個(gè)小題的三個(gè)選項(xiàng)中，選出最恰當(dāng)?shù)囊豁?xiàng)。

Do you get enough sleep? With so much homework it's often difficult for students to get enough rest. Sleep keeps you healthy and it stops you from getting fat. Teenagers usually need more than nine hours of sleep every day.

A group of American scientists did a survey of kids aged between 8 and   13. The study found that if kids slept for just one more hour each day,the chance of their getting fat was cut by about 30 percent.

Why? When people don5!get enough sleep,they will become tired. When they are tired,they won’t exercise enough. Also,kids like snacks. If they are awake one more hour or two each day,they will have more time to eat snacks or other unhealthy food. Teenagers should not be allowed to eat too much junk food.

Scientists suggest 10 to 11 hours a night for kids aged 5 to   12. For older kids,eight to nine hours will be enough.