2 . Are you preparing for a big test? If so, you may want to play some basketball in between hitting the books. Doctors are starting to find more and more information that suggests a connection between exercise and brain development. Judy Cameron, a scientist at Oregon Health and Oregon Health and Science University, studies brain development. According to her research, it seems that exercise can make blood vessels(管), including those in the brain, stronger and more fully developed. Dr. Cameron claims this allows people who exercise to concentrate better. As she says, "While we already know that exercise is good for the heart, exercise can really cause physical changes in the brain."

The effects of exercise on brain development can even be seen in babies. Babies who do activities that require a lot of movement and physical activity show greater brain development than babies who are less physically active. With babies, even a little movement can show big results. Margaret Barnes, a pediatrician(儿科医生), believes in the importance of exercise. She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies. "Babies need movement that stimulates their five senses. They need to establish a connection between motion and memory. In this way, as they get older, children will begin to associate physical activity with higher learning," says Margaret.

Older people can beef up their brains as well. Scientists from 11 universities studied a group of seniors ranging in age from seventy to seventy-nine. Their study showed a short-term memory increase of up to 40 percent after exercising just three hours a week. The exercise does not have to be very difficult, but it does have to increase the heart rate. Also, just like the motion for infants (婴儿), exercise for older people should involve some complexity. Learning some new skills or motions, such as with yoga or tai-chi, helps to open up memory paths in the brain that may not have been used for a long time.

For most people, any type of physical activity that increases the heart rate is helpful. The main goal is to increase the brain's flow of blood. And your brain can benefit from as little as three hours of exercise a week.

1. What is the best title of this passage?

A．How to exercise

B．How exercise helps the brain

C．How to get good scores on a test

D．How the brain can change

2. According to the reading, what is the connection between exercise and brain development?

A．Exercise makes us stupid.

B．The brain needs special mental exercise.

C．The more exercise, the bigger the brain.

D．Physical exercise helps us think better.

3. The mini amount of excises required to gain any benefit is ________.

A．three hours per week

B．40hours per week

C．three hours per day

D．40hours per month.

4. Why does the author think that yoga is fit for seniors?

A．It is easy to learn.

B．It can be done in groups.

C．It does not increase the heart rate.

D．It includes learning new motions.

3 . Moksh Jawa, 16, a student at Washington High School in the US, has already become a legend(传奇) among students. “Why not?” might be his favorite question to ask.

As a seventh-grader, he taught himself coding(编程) by studying on the Internet.

As a high school freshman, he passed the AP Computer Science A exam with a 5, the highest score possible.

As a sophomore (高中二年级学生), he developed his own online course and helped his classmates get through it because his high school didn't teach coding.

Everything he did came from his own interest. His father sent him a link to Codeacademy, an online coding training program, in middle school. He learned a programming(编程) language all by himself after signing up to the website.

“I just fell in love with computer science,” Jawa said. Along the way, he lit a fire of curiosity and passion among classmates to learn coding too.

“All of my friends, especially the girls, were really, really afraid of computer science,” he said. But the subject and exam weren't things to be feared, he said, “Computer science is all about logic(逻辑), not about how smart you are. ”

To make his knowledge available online, Jawa set about creating his own online course, with easy-to-follow lessons. He included quizzes and tests too.

The course has so far attracted 3, 200 students across the US and in 120 countries and regions, including China, Ukraine and Algeria.   It shows, Jawa said, the huge need for coding lessons.

When video lecturing, “I deliver it like I'm talking from one high school student to another .” Jawa said.“ It's always great to make it as clear and fun as possible, and to try to keep my voice as energetic as possible. ”

He also does that, when teaching members of the computer science club he founded at his high school.

“His tutorials(辅导) were great, ”said Taj Shaik, the club's co-president, who took the whole course last year. “I'm definitely one of the early adopters(使用者) of Moksh. ”

“He's pretty amazing, ”said Bob Moran, principal of Washington High School, who saw him lead the club. “He was just a fantastic teacher—clear, organized and entertaining. When a student got the right answer, he would throw him a candy. ”

1. Which of the following probably made Moksh Jawa a legend among students?

A．He created his own online coding course.

B．He welcomes any kind of challenge by asking, “Why not?”

C．He learned an intermediate programming language.

D．He earns a lot of money by coding for companies.

2. Which of the following would Jawa probably agree with?

A．You have to be smart to learn computer science well.

B．Interest is the most important when learning coding.

C．Computer science is not difficult to learn.

D．Coding is useful and everyone should know it.

3. According to the article, when teaching, Jawa ______.

A．is patient but strict with his students

B．likes to do things in a fixed order

C．usually applies unusual teaching methods

D．tries to make his classes simple yet interesting

4 . Playing tennis regularly could help keep people off death, but football, rugby and running may not help people to live longer, a study suggests.

A study followed more than 80,000 people for an average of nine years to find out if certain sports protected them against early death. It found that people who played racket sports regularly were the least likely to die over the study period, reducing their individual risk by 47 percent compared with people who did no exercise. Swimmers also reduced their chance of death by 28 percent, aerobics (有氧运动) fans by 27 percent and cyclists by 15 percent. Yet running appeared to have no impact at all on dying early, and neither did playing football or rugby.

Scientists say the difference may lie in the social aspect which goes alongside sports like tennis and squash (壁球), which often involve clubs and organized activities outside of the game. It means that people often have larger social net-works and tend to keep up activities into later life, both of which are proven to be good for health.

In contrast, people who play team sports often do not move onto a new sport once their teams break up for family, or injury reasons. They become watchers rather than participants in their chosen activity.

The researchers found that playing racket sports was associated with a 56 percent lower risk from heart death. Similarly, swimmers lowered their heart disease or stroke risk by 41 percent, and people who took part in activities like aerobics, dance or gymnastics lowered their risk by 36 percent. But again running, football and rugby had no significant impact on heart deaths.

However, other experts argue that this study must not be misinterpreted as showing that running and football do not protect against heart disease. In this study both runners and footballers had a lower rate of death from heart disease.

1. Which sport has hardly any impact on protecting people against early death?

A．Cycling.	B．Swimming.
C．Rugby.	D．Tennis.

2. According to the study, which makes a big difference in keeping healthy?

A．Playing basketball with their friends occasionally.

B．Watching football games every day.

C．Taking up gymnastics and joining a club.

D．Doing running in the park every day.

3. What is considered more important to people's health?

A．Social networks.	B．Staying at home.
C．Physical examinations.	D．Setting up families.

4. What is the main idea of the text?

A．Thousands of people participated in a 9-year research.

B．Study finds playing tennis helps people live longer.

C．It is wrong to say running has no impact on heart disease.

D．There are differences between racket sports and team games.

5 . People have always wanted to know what the future will look like. Then, how can we?     1       The world has changed a lot in the last 150 years, but we humans are driven by the same basic needs as we were 150 years ago, such as food, sleep, the feeling of being appreciated and loved.     2     No. In addition, generally speaking, the inventions for the last 150 years have been a human effort for freedom and communication, to be able to get in control of the time and world. Since there is still much to do in this area, this will be the focus at least for the next 150 years.

But why do we need to predict the future? Predicting the future is important for two reasons: First, we need to start to think about what kind of future we would like for ourselves and to pass on to the next generation.     3    

How about the virtual worlds? It might be in the future to experience the sand between your toes, and hear the waves, just lying in your bed at home.     4     So, even if a great invention is there for an affordable price, it’ll never take the place of the common experience if it is not real.

    5     What we’ll see in the next 50 years is the transition (过渡) from an oil-dependent society to a new society. Here there’ll be new medicine, continued exploration of space, challenges in the climate change, and new inventions that make life a little easier.

A．So what will the future look like then?

B．Will this change in the next 150 years?

C．Predicting the future can help us in many ways.

D．However, you’ll never get the feeling of being there.

E．Well, to understand the future, you must know the past.

F．However, no matter how real the experience will feel, it doesn’t happen for real.

G．Then we need to know what decisions we need to make today that will give the best result in the future.