1 . Running is often tiring and a lot of hard work, but nothing beats the feeling you get after finishing a long workout around the track.

But while it’s long been believed that endorphins (内啡肽) —chemicals in the body that cause happiness—are behind the so-called “runner’s high”, a study suggested that there may be more to this phenomenon than we previously knew.

According to a recent study published by a group of scientists from several German universities, a group of chemicals called endocannabinoids (内源性大麻素) may actually be responsible for this familiar great feeling.

To test this theory, the scientists turned to mice. Both mice and humans release high levels of endorphins and endocannabinoids after exercise. After exercising on running wheels, the mice seemed happy and relaxed and displayed no signs of anxiety. But after being given a drug to block their endorphins, the mice’s behavior didn’t seem to change. However, when their endocannabinoids were blocked with a different drug, their runners’ high symptoms seemed to fade.

“The long-held notion of endorphins being responsible for the runner’s high is false. Endorphins are effective pain relievers, but only when it comes to the pain in your body and muscles you feel after working out,” Patrick Lucas Austin wrote on science blog Lifchacker.

Similar studies are yet to be carried out on humans, but it’s already known that exercise is a highly effective way to get rid of stress or anxiety. The UK’s National Health Service even prescribes (开药 方) exercise to patients who are suffering from depression. “Being depressed can leave you feeling low in energy, which might put you off being more active. Regular exercise can improve your mood if you have depression, and its especially useful for people with mild to moderate (中等的) depression,” it wrote on its website.

It seems like nothing can beat that feeling we get after a good workout, even if we don’t fully understand where it comes from. At least if we’re feeling down, we know that all we have to do is to put on our running shoes.

1. What did scientists from German universities recently discover?

A．Working out is a highly effective way to treat depression.

B．The runner’s high could be caused by endocannabinoids.

C．Endorphins may contribute to one’s high spirits after running.

D．The level of endorphins and endocannabinoids could affect one’s mood.

2. Why did the scientists give mice drugs in their experiment?

A．To find what reduces the runner’s high symptoms.

B．To see the specific symptoms of the runner’s high.

C．To identify what is responsible for the runner’s high.

D．To test what influences the level of endocannabinoids released.

3. What does the underlined word “notion” mean?

A．Effect.

B．Goal.

C．Opinion.

D．Question

4. What can we know about regular workouts according to the UK’s National Health Service?

A．They can help ease depression symptoms.

B．They are the best way to treat depression.

C．They only work for those with serious depression.

D．They can help people completely recover from depression.

6 . 听下面一段较长对话，回答以下小题。
1. When did Rob first decide to go surfing?

A．When his father offered to teach him.

B．When his mom gave him a board.

C．When he saw some local matches.

2. What does Rob say about surfing in the winter?

A．He wears warm wetsuit.

B．The sea is warmer than the land.

C．It is difficult to stand on the board.

3. How did Rob feel about surfing the enormous wave?

A．He was afraid of falling off his board.

B．He was worried at first by the size of the wave.

C．He was upset he did not have the right board.

4. What does Rob want to do next?

A．Think of surfing as a career.

B．Study surfing science at university.

C．Train for the next surfing match.

9 . Physical education, or PE, isn’t required for all high school students. In some schools, it isn’t offered for some different reasons. But should high school students have physical education? The answer is certainly “yes”.

Today many people don’t do sports. But as is known to all. doing sports is very important for an adult. Teaching teens the importance of a healthy lifestyle and making fitness plans now can help teens put exercise in the first place as an adult.

High school isn’t that easy. Many students are under a lot of stress. Stress can be harmful to a student’s studies and life. Doing sports can help them deal with stress better, helping them live a happier life at school.

The American Heart Association says that 10 million kids and teens suffer from obesity (肥胖). Teens should get 60 minutes of physical activity per day to control their weight and to help their bones get stronger. The increase in activities that don’t get teens to move around, such as computer games, means many teens don’t get their required exercise. PE classes act as a public health measure (措施) to encourage physical activities and help teens have healthy weights.

Not doing sports increases teens’ hazard of developing many diseases. An active lifestyle offers a good way of protection from these health problems. As much as 75 percent of health-care spending goes toward treating medical conditions that can be prevented by lifestyle changes, according to the American College of Sports Medicine.

According to the President’s Council on Fitness, Sports and Nutrition (PCFSN), students who performed five hours of physical activities each week improved their academic (学业的) performance. Students from programs with no physical activity, who used the extra time for classroom study, did not perform better on tests than those who gave up some study time in support of physical education.

1. According to Paragraph 2, what does physical education in high school mean?

A．Making teens attach importance to ęxercise later.

B．Removing the stress faced by teens at school.

C．Getting teens to encourage adults to exercise.

D．Helping teens learn to make good plans

2. What does the underlined word “hazard” in Paragraph 5 mean?

A．Happiness.

B．Risk.

C．Safety.

D．Sadness.

3. According to the PCFSN, doing sport          .

A．means making students choose between sports and studies

B．helps students make good use of all their time

C．means students adjust to their studies better

D．helps students do better in their studies

4. What is the text mainly about?

A．Why high school students should receive physical education.

B．Why some schools consider physical education important.

C．How schools can help students love doing sports.

D．How high school students can live a better life.

10 . 阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式。

The Olympic Games are the most important sports meeting in the world,     1    include two sets, the Summer and the Winter Olympics. Both of them    2    (hold) every four years for a longtime. All athletes have the chance to take part if they reach the     3    (agree) standard for the Olympics. Women are not just allowed to join in but also play     4     important role. A special village is built for the    5    (compete) to live    6     . New stadiums and gymnasiums are also prepared for those who watch the Games.    7     is a great honor to host the Olympic Games. So there is as much competition among countries     8     (host) the Games as to win Olympic medals. Although people in ancient Greece could never     9    (imagine) the olive wreaths would be replaced by medals, yet it’s still about being about to run faster, jump higher and throw     10    (far).