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.

7 . 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.

8 . In 1997, a group of twenty British women made history. Working in five teams with four women in each team, they walked to the North Pole. Apart from one experienced female guide, the other women were all ordinary people who had never done anything like this in their lives before. They managed to survive in an environment which had defeated several very experienced men during the same period.

Once on the ice, each woman had to ski along while dragging a sledge (雪橇) weighing over 50 kilos. This would not have been too bad on a smooth surface, but for long stretches (一片地域), the Arctic ice is pushed up into huge piles two or three meters high and the sledges had to be pulled up on side and carefully let down the other so that they didn’t crash. The temperature was always below freezing point and sometimes strong winds made walking while pulling so much weight almost impossible. It was also very difficult to put up their tents when they stopped each night.

In such conditions the women were making good progress if they covered fourteen or fifteen kilometers a day. But there was another problem. Part of the journey was across a frozen sea with moving water underneath the ice and at some points the team would drift (漂流) back more than five kilometers during the night. That meant that after walking in these very terrible conditions for ten hours on one day, they had to spend part of the next day covering the same ground again. Furthermore, each day it would take three hours from waking up to setting off and another three hours every evening to set up the camp and prepare the evening meal.

So, how did they manage to succeed? They realized that they were part of a team. If any one of them didn’t pull her sledge or get her job done, she would endanger the success of the whole expedition (远征探险). Any form of selfishness could result in the efforts of everyone else being completely wasted, so personal feelings had to be put to one side. At the end of their journey, the women agreed that it was mental effort far more than physical fitness that got them to the North Pole.

1. What was so extraordinary about the expedition?

A．It was a new experience for most of the women.

B．The women did not have any men with them.

C．The women had not met one another before.

D．There was no one leading it.

2. During the expedition, the women had to be careful to avoid________.

A．being left behind	B．damaging the sledges
C．falling over on the ice	D．breaking the ice

3. It was difficult for the women to cover 15 kilometers a day because________.

A．they got too tired	B．they kept getting lost
C．the ice was moving backwards	D．the temperatures were very low

4. Which of the following can best describe the women in the text?

A．Strict but caring.	B．Proud but patient.
C．Honest and devoted.	D．Determined and strong-willed.

5. What can we infer from the text?

A．Experience must be bought.

B．Facts speak louder than words.

C．He who risks nothing gains nothing.

D．Motivation and teamwork achieve goals.

9 . When the Chinese government first sent students to America in the late 19^th century, it could not decide whether their goal should be to acquire specific technical knowledge or to _______ new ways of thinking. More than a century later, a third of a million Chinese students are enrolled at American schools and universities. Yet folks back home remain _______ about what an American degree means.

Attending an American university is a good career move. It is also _______ as a soft option for well-off kids, scared of the gaokao, China’s brutal university-entrance exams. Yet many bright Chinese youngsters explain the appeal of an American education in a remarkably _______ fashion. One place to hear such dreams is an English-language debating tournament in the central city of Wuhan. It follows a(n) _______ popular at high schools across America, known as “Public Forum Debate”.

At first sight, the event bears the stamp of _______. It uses the classrooms at a bilingual private boarding school in Wuhan with its own golf course and an ice-hockey team coached by imported Russians. But the debate is not for big-city _______. It is run by the National High School Debate League of China, which _______ contests in dozens of Chinese cities each year. This one has _______ pupils, aged 13-18, from nine cities. Many will never study overseas.

The proposition is: “Countries should give ________ to climate-change adaptation over alleviation.” An early round is won by a pair of 17-year-old girls who attend the international section of a state-run high school in Shenyang. In confident, rapid-fire English the duo argue that climate change should be treated with realism. The pair also had speeches arguing the opposite ready, in case the coin-toss had gone ________.

Unlike America, where debating clubs are ________ by shouty, self-assured boys, most contestants in the Chinese league are girls. Of its 20 highest-ranked debaters, 16 are female. In a society that is still ________-centered, the chance to argue forcefully and be applauded for it has a rare appeal, suggests Liam Mather, the league’s executive director. The winners in Wuhan are Joyce Yi and Erica Chen, from a state school in the southern boomtown of Shenzhen. Their swaggering first-round performance leaves two ________ boys open-mouthed like fish. Ms Chen initially ________ debating in English because “I’m kind of an argumentative person.” Then she realized the subtle effects of having to research both sides of an argument. Chinese education emphasizes one correct answer to a question, she says.

1.

A．absorb

B．apply

C．practice

D．spread

2.

A．assured

B．disturbed

C．divided

D．suspended

3.

A．blamed

B．punished

C．scorned

D．warned

4.

A．idealistic

B．practical

C．realistic

D．variable

5.

A．access

B．format

C．path

D．recipe

6.

A．challenge

B．democracy

C．economy

D．privilege

7.

A．amateurs

B．elites

C．inhabitants

D．migrants

8.

A．enters

B．exposes

C．issues

D．stages

9.

A．converted

B．convinced

C．drawn

D．withdrawn

10.

A．emergency

B．guarantee

C．priority

D．sympathy

11.

A．in the way

B．its own way

C．the other way

D．under way

12.

A．advocated

B．dominated

C．monitored

D．presented

13.

A．exam

B．male

C．money

D．power

14.

A．illiterate

B．ill-prepared

C．unexpected

D．unpredictable

15.

A．dreaded

B．fancied

C．ignored

D．tolerated

10 . Even if you’re a couch potato like me, you’ll know the benefits of running. But if you’re a real fitness fan, the ____ running challenge is to participate in a marathon. While many runners’ ______ is to beat their personal best and cross the finishing line without ______ , they’re also doing it for a good cause – to generate funds for ______ .

But just like other ______ events, the marathon also ______ a massive carbon footprint. Thousands travel - some by plane - to the location, and ______ from food packaging and goody bags gets left behind by ____ and runners. For example, during the London Marathon in 2018, ______ 47,000 plastic bottles were collected. This is becoming a big issue for cities – how to ______ a worthwhile event, encouraging people to exercise and help charities, while ______ the environment?

Several cities have ______formal plans to reduce their environmental influence and ______ sustainable (可持续的) ideas. One event in Wales, for example, introduced the recycling of ______ running equipment. The London Marathon tried to deal with the environmental problem by ______ the number of drink stations on the running route, ______ water in paper cups and offering some drinks in edible (可食的) seaweed capsules. They also tried new bottle ______ made from recycled plastic so 700 runners could ______ water bottles with them during their run.

Dr Andrea Collins from Cardiff University told the BBC: "Training for a marathon makes you more sustainable in day-to-day activities. I started walking or running to work every day and _______ private cars altogether. Being environmentally friendly becomes a good ______ ." So while you not be an excellent runner in a marathon, let’s hope the event, in terms of sustainability, certainly is!

1.

A．basic

B．funny

C．fresh

D．ultimate

2.

A．courage

B．success

C．practice

D．motivation

3.

A．waiting

B．companying

C．collapsing

D．struggling

4.

A．environment

B．charity

C．education

D．health

5.

A．major

B．historic

C．famous

D．rare

6.

A．works on

B．gives off

C．results in

D．finds out

7.

A．mixture

B．waste

C．material

D．content

8.

A．volunteers

B．journalists

C．audiences

D．coaches

9.

A．approximately

B．naturally

C．probably

D．gradually

10.

A．host

B．witness

C．report

D．record

11.

A．governing

B．ignoring

C．cleaning

D．protecting

12.

A．expected

B．developed

C．changed

D．considered

13.

A．promote

B．transform

C．test

D．share

14.

A．old

B．modern

C．electrical

D．standard

15.

A．checking

B．doubling

C．arranging

D．reducing

16.

A．pouring down

B．drinking up

C．taking away

D．giving out

17.

A．covers

B．belts

C．bodies

D．openers

18.

A．fill

B．carry

C．pass

D．connect

19.

A．avoiding

B．providing

C．buying

D．taking

20.

A．chance

B．reason

C．lifestyle

D．event