1 . Race walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.

Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing and one foot remain in contact (接触) with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass.

Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.

However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.

As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.

1. Why are race walkers conditioned athletes?

A．They must run long distances.

B．They are qualified for the marathon.

C．They have to follow special rules.

D．They are good at swinging their legs.

2. What advantage does race walking have over running?

A．It’s more popular at the Olympics.

B．It’s less challenging physically.

C．It’s more effective in body building.

D．It’s less likely to cause knee injuries.

3. What is Dr. Norberg’s suggestion for someone trying race walking?

A．Getting experts’ opinions.

B．Having a medical checkup.

C．Hiring an experienced coach.

D．Doing regular exercises.

4. Which word best describes the author’s attitude to race walking?

A．Skeptical.	B．Objective.
C．Tolerant.	D．Conservative.

2 . Pennsylvania is full of mysterious places! One of those is an old turnpike （收费高速公路） _______ for decades. My dad loves history, and he learned it was open to the public. _______, when I was 14, we took a bike trip to _______ this road!

My dad chose a 16-mile _______ of the road for us to ride. Part of it included an old tunnel called Sideling Hill which is over a mile long! To _______, we checked our tires and made sure our lights had batteries. In the morning, we loaded our bikes into the car and set off. As we approached the tunnel, I felt _______ as it was absolutely black inside! But Dad encouraged me. He said he would be beside me. He reminded me to stay _______ and keep my light on!

When we _______ the tunnel, the sound of our bikes was heard through the darkness. I shined my flash light around and saw walls _______in graffiti （涂鸦）.And I felt like I was being __________! I was pretty scared, but __________ on following Dad helped me relax. After riding half-way through, I could see light coming from the other end, motivating me to keep going. And I was so delighted to ride out into the bright afternoon!

Whenever going through __________ in life, I remember this trip. It reminds me that my father is always beside me. He turns on the light of hope in my __________, as well as gives me __________ to keep riding through life's   __________ tunnels.

1.

A．designed

B．destroyed

C．abandoned

D．locked

2.

A．However

B．Otherwise

C．Therefore

D．Meanwhile

3.

A．explore

B．construct

C．protect

D．repair

4.

A．tunnel

B．section

C．block

D．course

5.

A．participate

B．register

C．cooperate

D．prepare

6.

A．excited

B．nervous

C．annoyed

D．exhausted

7.

A．silent

B．curious

C．cautious

D．positive

8.

A．approached

B．observed

C．constructed

D．entered

9.

A．covered

B．buried

C．absorbed

D．dressed

10.

A．forced

B．watched

C．abused

D．judged

11.

A．depending

B．surviving

C．calling

D．focusing

12.

A．accidents

B．hardships

C．regulations

D．incidents

13.

A．chest

B．trip

C．work

D．heart

14.

A．courage

B．pride

C．excitement

D．enthusiasm

15.

A．difficult

B．distant

C．dark

D．long

3 . If you could change your child's DNA in the future to protect them against diseases, would you? It could be possible because of technology known as CRISPR- Cas, or just CRISPR.

CRISPR involves a piece of RNA, a chemical messenger, designed to work on one part of DNA； it also uses an enzyme (If) that can take unwanted genes out and put new ones in, according to The Economist. There are other ways of editing DNA, but CRISPR will do it very simply, quickly, and exactly.

The uses of CRISPR could mean that cures are developed for everything from Alzheimer's to cancer to HIV. By allowing doctors to put just the right cancer-killing genes into a patient's immune system, the technology could help greatly.

In April scientists in China said they had tried using CRISPR to edit the genomes (基因组)of human embryos. Though the embryos would never turn into humans, this was the first time anyone had ever tried to edit DNA from human beings. With this in mind, the US' National Academy of Sciences plans to discuss questions about CRISPR s ethics(伦理问题).For example_? CRISPR doesn't work properly yet. As well as cutting the DNA it is looking for, it often cuts other DNA, too. In addition, we currently seem to have too little understanding of what DNA gives people what qualities.

There are also moral questions around playing God”. Of course, medicine already stops natural things from happening-for example, it saves people from infections. The opportunities to treat diseases make it hard to say we shouldn't keep going.

A harder question is whether it is ever right to edit human germ-line(种系)cells and make changes that are passed on to children. This is banned in 40 countries and restricted in many others. However, CRISPR means that if genes can be edited out, they can also be edited back in. It may be up to us as a society to decide when and where editing the genome is wrong.

Also, according to The Economist, gene editing may mean that parents make choices that are not obviously in the best interests of their children: “Deaf parents may prefer their children to be deaf too； parents might want to make their children more intelligent at all costs.

In the end, more research is still needed to see what we can and can't do with CRISPR. “It's still a huge mystery how we work,” Craig Mello_? a UMass Medical School biologist and Nobel Prize winner, told The Boston Globe, "We're just trying to figure out this amazingly complicated thing we call life.

1. What is the passage mainly about?

A．What we can and can't do with CRISPR.

B．How CRISPR was developed by scientists.

C．The advantages of CRISPR and arguments about its ethics.

D．Scientists' experiments of using CRISPR to edit human embryos.

2. According to the passage, the technology of CRISPR .

A．is very safe because it only cuts the DNA it is looking for

B．is banned in most countries and restricted in many others

C．could cause parents to make unwise choices for their children

D．could help us discover the link between DNA and the qualities it gives people

3. It can be inferred from the passage that .

A．all diseases could probably be cured through the uses of CRISPR

B．scientists had never edited genomes before CRISPR was invented

C．CRISPR is a technology that uses an enzyme to work on RNA and DNA

D．CRISPR has proven to be the most effective way to protect children against diseases

4. What is the author's attitude towards CRISPR?

A．Supportive.

B．Worried.

C．Negative.

D．Objective.

4 . Now in 2019, jazz music is an important part of Indianapolis’ art culture. Jazz clubs around the city still host concerts with local jazz musicians like Rob Dixon and Joel Tucker. One of these clubs, the Chatterbox Jazz Club, still has live jazz seven nights a week.

But the real history of jazz in Indy is much less simple. Along with the Avenue’s culture, jazz music was gone from the streets for many years.

Indiana Avenue was the heart of a neighborhood along the White River. It was a center for black music and live street music.The wealthy avoided this area. So it became a place that poorer families, including many African-American and immigrant (移民) families, moved to.

Jazz prospered in the mix of American cultures around the Avenue in the 1930s and 1940s. But in the 1950s, things changed. After the war, there were projects to make the city beautiful and build a university nearby. Both of these seemed like good changes. However, the new university and buildings caused poorer families to have to leave the area. This destroyed the Indiana Avenue community - and with it, its jazz culture.

After many years, Indianapolis remembered the value of its arts and music culture. It began to bring back lost cultures such as live music on the Avenue. To do so, it began to make new changes. The changes included repairing historic areas like the Avenue. Once again, the high living costs in these historic arts areas pushed low-income families out.

Today there are several old-style jazz clubs where friends can meet up to remember the past or just enjoy a summer evening. It might seem at first that jazz is alive again, but there is a sad reality behind these jazz clubs: Modern Indy jazz is only a shadow (影子) of the lively culture that was once on Indiana Avenue.

1. What does the author mainly want to say in Paragraph 1?

A．Jazz clubs can make big money.

B．Jazz musicians often hold concerts.

C．Jazz music is popular in Indianapolis.

D．Jazz culture is just part of Indianapolis' culture.

2. What does the underlined word “prospered” in Paragraph 4 mean?

A．Disappeared quickly.	B．Arrived soon.
C．Recovered soon.	D．Developed well.

3. What did Indianapolis do to bring back its lost culture?

A．It rebuilt some old important areas.

B．It invited old jazz musicians to sing in the city.

C．It educated people about the value of music culture.

D．It settled low-income families in the Indiana Avenue community,

4. According to the passage, which of the following about modern Indy jazz is true?

A．Its home culture is gone.

B．Its styles are too traditional.

C．It shows the sadness of the poor.

D．It is no longer a favorite of the young.

5 . Jake and Max Klein are twin brothers who have a passion for volunteering. Their family have always done community _______ .At a young age, they chose to _______ family's gifts at their birthday parties, but asked them to donate money to a charity. When they were seven, Jake and Max were interested in _______ with a family friend at the local homeless shelter to help cook. _________， he turned them down because they were too _______ and they had to be fourteen to cook. This led them on an endless _______ to come up with a way to help other kids who were also facing a _______ challenging: wanting to help but _______ because of their age.

So, Kids That Do Good was _______ to show ways to kids or adults, at any age, they could join the community and make a ________ .The small ________ has grown into a large website that brings thousands of ________ visitors each year. Jake and Max say that their website brings 35,000 unique viewers, of those viewers, Kids That Do Good has ________ kids to 16,000 organizations.

Jake and Max are ________ with school and after-class activities and other community service promises. Kids That Do Good also has blog posts that advise kids on ________ their own charitable event.

1.

A．surveys

B．services

C．duties

D．businesses

2.

A．sort out

B．play with

C．give up

D．put away

3.

A．travelling

B．volunteering

C．cooking

D．recycling

4.

A．Unfortunately.

B．Happily

C．Honestly

D．Gratefully

5.

A．shy

B．awkward

C．weak

D．young

6.

A．task

B．ability

C．chance

D．determination

7.

A．public

B．similar

C．sharp

D．direct

8.

A．joked

B．blamed

C．denied

D．praised

9.

A．advised

B．allowed

C．named

D．created

10.

A．judgment

B．difference

C．comment

D．decision

11.

A．plan

B．effort

C．project

D．experiment

12.

A．pleased

B．satisfied

C．amazed

D．interested

13.

A．connected

B．exposed

C．contributed

D．attracted

14.

A．familiar

B．patient

C．busy

D．content

15.

A．remembering

B．describing

C．celebrating

D．building

6 . My roommate Lily was well organised, while I was not. Each of her things had its place, but mine were always hidden somewhere. She even labeled (贴标签于) everything. I always looked for everything. Over time, Lily got neater and I got messier. She would push my dirty clothing over, and I would lay my books on her tidy desk. We both got tired of each other.

War broke out one evening. Lily came into the room. Soon, I heard her screaming. “Take your shoes away! Why under my bed! “Deafened, I saw my shoes flying at me. I jumped to my feet and started yelling. She yelled back louder.

The room was filled with anger. We could not have stayed together for a single minute but for a phone call. Lily answered it. From her end of the conversation, I could tell right away her grandma was seriously ill. When she hung up, she quickly crawled (爬) under her covers, sobbing. Obviously, that was something she should not go through alone. All of a sudden, a warm feeling of sympathy (同情) rose up in my heart.

Slowly, I collected the pencils, took back the books, made my bed, cleaned the socks and swept the floor, even on her side. I got so lost in my work that I even didn’t notice Lily had sat up. She was watching, her tears dried and her expression a kind of disbelief. Then, she reached out her hands to grasp mine. I looked up into her eyes. She smiled at me, “Thanks.”

Lily and I stayed roommates for the rest of the college years. We didn’t always agree, but we learned.

1. How is Paragraph 1 mainly developed?

A．By analyzing causes.	B．By following time order.
C．By showing differences.	D．By describing a process.

2. What made Lily so angry one evening?

A．She heard the author shouting loud.

B．She saw the author’s shoes under her bed.

C．She got the news that her grandma was ill.

D．She couldn’t find her books anymore.

3. Why did the author clean up the room?

A．Because she wanted to show her care for Lily.

B．Because she hated herself for being so messy.

C．Because Lily required her to do so.

D．Because she was scared by Lily’s anger.

4. What might be the best title for the passage?

A．Hard Work Pays Off	B．Learning to Be Roommates
C．My Friend Lily	D．How to Be Organised?

7 . The symphony ended and after much applause the audience moved out of the warmth of the hall and into the cold night air. It had been one of the best performances of recent months and you could feel the excitement as the crowd moved down the street. Taxis seemed to appear from nowhere to convey people home，while others sought out bars and restaurants. Everyone was chatting excitedly and the magic of the performance carried on in their minds.

This had been a traditional classic，with none of the clumsy notes so loved by the so-called modernists. The music had thrilled the soul and assisted in lifting the spirits to a higher level. Perhaps in these hard times someone might learn this valuable lesson. What was wanted was traditional works that attracted crowds，not the shameful and incomprehensible pieces that had left so many seats unoccupied for so long.

As the people left they seemed to carry some of the performances along with them. It was like the fragrance of a rose bush carried by a gentle wind，sweet and exciting，yet at a distance the source unknown. A few hummed（哼）the tunes as they walked along，spreading their enjoyment far and wide. Long into the night you could still feel the emotion of the music and as dawn rose over the city the next day，the last faint echoes（回声）still remained as people returned to work.

Critics are critics；they are never really interested in ordinary people and simple pleasures. Where was the skill in simply playing well to a fascinated audience？What was advanced by the performance of well-known overtures（序曲）？So，as would be expected，they used their usual phrases and quotations to belittle（贬低）the traditional classics. As a result，the pop returned. And within a week the concert hall was almost empty again.

1. The first paragraph is intended to tell us ________.

A．many people attended the concert

B．how the people spent their evening

C．the concert impressed those people

D．many people were fascinated with music

2. In the author's opinion，________.

A．modern music is preferable

B．classics are more valuable

C．classics are incomprehensible

D．modern music equals classics

3. In what background was the concert held？

A．Most people didn't like pop music.

B．The economy was rapidly developing.

C．Cultural life was rather short.

D．The country was in difficulty.

4. What is the author's attitude toward music critics？

A．Favorable.	B．Negative.
C．Positive.	D．Subjective.

8 . What’s your opinion on spicy food? Some people cannot handle even the smallest amount of chili peppers in their dinner while others can’t get enough of them.

Scientists have long been puzzled by why some people love the chili while others loathe it. Plenty of research has been done on the subject, dating as far back as the 1970s. Previous results showed that a love of chilies is related to childhood experiences, and that cultural influences affect our taste too. But the latest study has found that a person’s love of spicy food may be linked to his or her personality (性格) more than anything else, CBC News reported.

“We have always assumed that liking drives intake — we eat what we like and we like what we eat. But no one has actually directly bothered to connect personality with intake of chili peppers,” said Professor John E. Hayes from Pennsylvania State University, who led the study.

But before you look at the study, you should first know that “spicy” is not a taste, unlike sour, sweet, bitter and salty taste. It is, in fact, a burning feeling that you feel on the surface of your tongue. This got scientists thinking that maybe a love of spicy food is brought about by people’s longing for thrill, something they usually get from watching action movies or riding a roller coaster.

In the study, 97 participants, both male and female, were asked to fill out questionnaires about their personality, for example, whether they like new experiences or tend to avoid risks. They were then given a glass of water with capsaicin (辣椒素), the plant chemical that makes a chili burn, mixed into it.

By comparing the answers to the questionnaire and what participants said they felt about the spicy water, researchers found that those who tended to enjoy action movies or take risks were about six times more likely to enjoy the spicy water.

Interestingly, we used to believe that the reason why some people can withstand (耐受) spicy food is that their tongues have become less sensitive to it. However, this latest study has found otherwise. “It’s not that it doesn’t burn as badly, but that you actually learn to like the burning feeling,” Hayes explained.

1. What’s the meaning of the underlined word “loathe” in the second paragraph?

A．Dislike.	B．Fear.
C．Put up with.	D．Adapt to.

2. What did Professor John E. Hayes and his team discover from their study?

A．What we eat actually helps to develop our personality.

B．Males are more likely to enjoy spicy food than females.

C．Those trying to avoid risks tend to be less interested in spicy food.

D．People are wrong to treat " spicy" as a kind of taste rather than a feeling.

3. Why do some people like spicy food according to the recent study?

A．Because their taste has become less sensitive.

B．Because they love the burning feeling.

C．Because they want to challenge themselves.

D．Because the more they try spicy food, the less it burns.

4. What’s the main idea of the passage?

A．What one likes to eat mainly depends on one’s personality.

B．Whether one enjoys spicy food depends largely on one’s personality.

C．One’s personal experiences have nothing to do with their taste.

D．Different people have different taste.

9 . In the near future， daily newspapers and monthly magazines will probably disappear． Electronic media（媒体） can provide the same information faster and cheaper． The Internet， together with laptops and mobile phones， makes it possible that almost everyone can at any time and in almost any place get some news for free or for few fees．

You'll browse the computer newspapers or magazines just like turning on TV． An electronic voice will tell you stories about the latest events． You'll even get to choose the kind of voice you want to hear． Want more information on the brief story？ A simple touch makes the whole text appear．

There are the predictions from the experts working on the newspapers of the future． Imagined as part of home media and entertainment systems， computer newspapers and magazines would unite printed and broadcast news， offering information and analyzing video images of news events．

The continuing loss of readers will lead to a small number of advertisements in newspapers． It makes no sense to spend millions of dollars to print ads．

With the development of technology， more and more electronic media have been created until now， but replacing the traditional newspapers and magazines has a long way to go， because the resistance to computer newspapers and magazines from journalism（新闻业） may be much stronger． Since it is such a cultural change， it may be not until the present journalists（新闻工作者）， who aren't used to it， die off that the newspaper industry is not considered as an industry any longer． Anyway， technology is making the traditional newspapers and magazines disappear gradually．

1. Computer newspapers and magazines have all the advantages EXCEPT that ______ ．

A．you can choose the kind of voice you like to hear．

B．they are more expensive than traditional newspapers．

C．you can get more information from them easily．

D．you can easily store information for the future use．

2. The underlined word "resistance" in the fifth paragraph probably means ______ ．

A．a thought which directs your action

B．an idea which is different from others

C．a force that helps you do something

D．a force that acts to stop something happening

3. We can infer from the passage that ______ ．

A．new things will replace the old ones in the future．

B．traditional newspapers and magazines will disappear soon．

C．all technological developments are very important．

D．traditional newspapers and magazines will be more popular．

4. The author writes the article to ______ ．

A．tell readers what newspapers and magazines are like in the future

B．let people know the great development of the journalism

C．prove newspapers and magazines are not welcomed any more

D．say traditional newspapers and magazines are better than before

10 . Daily physical activity is an important part of a healthy lifestyle. For this reason, many architects and designers are working to create buildings that encourage people to make exercise a part of their ordinary routine. The movement to promote healthy activity through architecture is called active design. It began in 1998 as part of a university public health program, and it has since gained popularity in cities around the world. Active design uses a number of techniques to encourage the occupants of a building to be more active.

One of the most important strategies of active design is inspiring people to make walking part of their routine. A particularly successful tool for promoting walking is the skip-stop elevator. These elevators stop only on every second or third floor, leaving riders to take the stairs in order to reach their destination. Another strategy of active design is to make stairs more pleasant and inviting. Instead of creating dark stairwells that are located in isolated parts of buildings, active design uses well-lit and centrally placed stairs to encourage more foot traffic. Skip-stop elevators and appealing stair design are both effective tools of active design because they offer incentive and opportunity for exercise. In fact, researchers studying a building that employs both skip-stop elevators and more attractive stair design said that 70 percent of building occupants reported using the stairs every day.

Active design encourages physical activity using not only the interior features of a building, but the relationship between a building and its surroundings as well. A building that employs active design may integrate outdoor space in order to make the environment more engaging and promote physical activity. Some elements that architects use to incorporate the exterior with the interior are glass walls, interior gardens or park spaces, and courtyards with open ceilings, all of which de-emphasize the boundaries between inside and outside. These elements make the building more physically and mentally invigorating. Similarly, by increasing the number of entrances and exits to a building, architects can help keep a building’s users interested in their surroundings by providing a variety of routes for them to use. If people continue to be stimulated by new sights or experiences, they are less likely to choose the quickest and easiest path to their destination and may instead choose a more physically challenging route.

1. What does the underlined word “incentive” in paragraph 2 mean?

A．requirement	B．encouragement
C．technique	D．assistance

2. Why does the author discuss dark stairwells in paragraph 2?

A．To demonstrate the differences between elevator and stairwell design.

B．To describe one advantage of using skip-stop elevators in buildings.

C．To make a point about why people don’t use the stairs often.

D．To argue that skip-stop elevators may lead to design failures.

3. Which of the following is NOT a way that architects weaken the boundary between indoor and outdoor spaces?

A．Creating more routes for entering and exiting.

B．Building gardens inside the building.

C．Creating spaces with open ceilings.

D．Using see-through materials.

4. How does paragraph 2 relate to paragraph 3 in the passage?

A．Para 2 describes an early model of a design discussed in para 3.

B．Para 3 argues about the effectiveness of the technique from para 2.

C．Para 3 introduces a different strategy than the one discussed in para 2.

D．Para 2 explains a technique, and para 3 gives examples of how it is used.