Question

    Teenagers believe anything is possible if they study hard. But they often forget to think about healthy diets, enough sleep time and exercise. In fact, these things are really important for them to keep fit.

It is important for teenagers to get enough energy. Teenage girls need about 2,200 calories a day while boys need a bit more—doctors suggest 2,800 for teenage boys.50% of their calories should come from healthy food—rice, vegetables and fruit. People often say an apple a day keeps the doctor away. Teenagers also need to drink a lot of water,6 to 8 glasses a day. Drinking enough water will improve their skin.

Teenagers usually need eight to ten hours’ sleep at night, but many Chinese teenagers do not get enough sleep. A report shows that without a good night’s sleep, teenagers seem to be weaker than they should be. Too much homework is not the only reason why teenagers stay up late. Some watch TV or play computer games late into the night. Teenagers should develop good study habits.So some clever students never study late, but they are able to work well in class.

Exercise is something that can help them. Experts suggest that teenagers should spend at least 30 minutes exercising a day, five times a week. They will feel relaxed when they exercise. It can even help them sleep better at night.

1.How many things are important for teenagers to keep fit?

A.2. B.3. C.4. D.5.

2.Half of their calories should come from.

A.rice,vegetables and fruit B.rice,vegetables and meat

C.rice,vegetables and water D.milk and meat

3.The last paragraph(段) mainly talks about.

A.sleeping better B.basic energy

C.necessary exercise D.more exercise

4.Which of the following is NOT true?

A.Boys need much more calories than girls. B.Teenagers need to drink 6 to 8 glasses of water a day.

C.Some clever students never study late. D.They will feel relaxed when they exercise.

5.The passage tells teenagers how to .

A.eat and drink well B.study hard C.keep fit D.drink well

Answer

1.B

2.A

3.C

4.A

5.C

【解析】

文章大意：本文主要介绍了学生学习固然重要，但是健康的饮食、足够的睡眠和锻炼是保持健康的重要因素。

1.细节理解题。根据But they often forget to think about healthy diets, enough sleep time and exercise. In fact, these things are really important for them to keep fit. 但他们经常忘记考虑健康的饮食、充足的睡眠时间和锻炼。事实上，这些东西对他们保持健康非常重要。可知，对青少年来说保持健康有三件事，即饮食、睡眠和锻炼。故答案选B。

2.细节理解题。根据50% of their calories should come from healthy food—rice, vegetables and fruit. 他们50%的热量应该来自健康的食物——米饭、蔬菜和水果。可知 可知，一半的能虽来自米饭、蔬菜和水果。故答案选A。

3.段落大意题。根据最后一段的第—句Exercise is something that can help them.可知，这一段主要讲述锻炼的必要性。故答案选C。

4.理解判断题。根据Teenage girls need about 2,200 calories a day while boys need a bit more—doctors suggest 2,800 for teenage boys. 十几岁的女孩每天需要大约2200卡路里的热量，而男孩则需要更多一点。医生建议，十几岁的男孩每天需要2800卡路里。可知男孩需要的卡路里比女孩稍微多一点， 并非多得多；选项中的much与a bit含义不同，所以A选项不符合文意，错误。根据Teenagers also need to drink a lot of water,6 to 8 glasses a day. 青少年还需要喝大量的水，每天6到8杯水。可知B选项符合文意，正确。根据So some clever students never study late, 因此，一些聪明的学生从不学习到很晚，可知C选项符合文意，正确。根据They will feel relaxed when they exercise. 当他们运动时，他们会感到放松。可知D选项符合文意，正确。故答案选A。

5.主旨大意题。根据第一段Teenagers believe anything is possible if they study hard. But they often forget to think about healthy diets, enough sleep time and exercise. In fact, these things are really important for them to keep fit. 青少年相信只要努力学习，一切皆有可能。但他们经常忘记考虑健康的饮食、充足的睡眠时间和锻炼。事实上，这些东西对他们保持健康非常重要。然后在接下来的三段中分别从饮食、睡眠和锻炼三个方面介绍如何保持健康。由此可知短文主要告诉青少年如何保持健康，故答案选C。