【推荐1】Many students give up sleep to get good grades: but research shows that students should do the opposite.

It's no secret that college students tend to reduce sleep to squeeze the most out of 24 hours. But this generation is different, and researchers are increasingly focusing on college students because they are one of the most populations lack of sleep. College students go to bed one to two hours later and sleep less per night on average compared to previous generations. As a result, 75% of undergraduates did not sleep enough to feel rested on five or more days per week, and 19% reported that sleep difficulties had an influence on academic（学业） performance in the past year.

The amount of sleep that a college student gets is one of the strongest predictors of academic success. Sleep plays a key role in helping students fix and Improve memories. while preventing drops in memory. Without sleep, people work harder but don't do as well.

Members of the Student Health Advisory Council(SHAC)consulted famous sleep researchers and gave suggestions to University Health Service（UHS） clinicians（临床医师） on how to address sleep with student patient. Here are some suggestions for UHS clinicians to consider in their work with students.

Encourage students to adjust(调整)wake-up time, as it may be easier to adjust than bedtime.

Emphasize( 强调)behavioral changes to improve sleep. Medicine is rarely. Students can practice relaxation techniques before bed to increase quality of sleep, avoid doing homework immediately before(or in)bed, and avoid TV and computer use before bed.

Encourage napping, Most students don’t get a full night sleep every night, and naps help them make up the difference. Research shows that napping for 10-45 minutes(before entering REM sleep)can increase performance.

Advise students to avoid caffeine, especially later in the afternoon or night.

1. What does the underlined part "do the opposite "in Paragraph 1 mean?

A．Spend more time on study

B．Make better use of time

C．Get better grade

D．Get more sleep

2. What do we learn about today’s college students?

A．They have performed academically better than before.

B．They are lazier than previous generations.

C．They generally lack sleep

D．They often find it hard to fall asleep

3. Paragraph 3 mainly shows that______.

A．good study methods are very important

B．a lack of sleep harms students' performance

C．a student's academic success can be predicted

D．students should try to improve their memories

4. What may UHS clinicians suggest students do?

A．Try to wake up later

B．Go to bed much earlier.

C．Take some medicine when necessary.

D．Get some REM sleep through napping

【推荐2】A cozy environment fostering focused thinking and concentration on books is what study lounges are all about. Ideal for students with limited options as after-school study spaces. And relatively cheap.

The demand for study lounges rose in China because students can hardly find a peaceful place to study after finishing classes. Before 2018, there were few study lounges in China, and the few that existed were mainly in first- and second-tier cities such as Guangzhou, Suzhou and Tianjin. Yet by 2019, they had become popular nationwide.

But the pandemic (流行病) has dealt a blow to the industry. Since personal contact in a closed environment is unavoidable, the pandemic forced all study lounges to shut down for several months. Lou Qingxiao, founder of Xinliuzaowu, one of Beijing’s earliest study lounge brands that opened in 2018, said their first study lounge near Renmin University of China had made ends meet before the pandemic. Li Hang and Zhang Yang, co-founders of Sishiloushi, a Beijing-based independent study lounge, said that even before COVID-19 broke out, the industry’s profit was neither promising nor clear, let alone in such a particular period.

“Rent is a major fixed cost for study lounges, especially in first-tier cities,” Lou said. In a first-tier city such as Beijing, rentals comprise more than a half of a study lounge’s monthly operation cost. But Lou sounds optimistic about the industry commercial prospects, “because it’s a blue ocean with less competition.”

Study lounges provide a better learning experience that people cannot get in free public libraries. “Privately operated study lounges like ours actually make up for the shortage of public infrastructure (基础设施) and public services and we are willing to cooperate with the government to better serve the public.” Li said.

1. What contributes to the rise of study lounges in China?

A．The rapid development of cities.

B．The shrinking number of libraries.

C．The need for a peaceful study environment.

D．The lack of alternative after-school activities.

2. What is the third paragraph mainly about?

A．The earliest study lounge brands in China.

B．A guideline on finding famous study lounges.

C．An introduction to the founders of study lounges.

D．The influence of the pandemic on study lounges.

3. What does Lou Qingxiao think of the future of the study lounge?

A．It is promising.	B．It is unclear.
C．It will be full of competition.	D．It will be free of rent.

4. What can we infer about the operation of study lounges from the last paragraph?

A．Government involvement is welcome.

B．The infrastructure construction is needed.

C．Study lounges should be privately operated.

D．Cooperation with public libraries has been achieved.

【推荐3】As you are probably aware, the latest job markets news isn’t good: Unemployment is still more than 9 percent, and new job growth has fallen close to zero. That’s bad for the economy, of course. And it may be especially discouraging if you happen to be looking for a job or hoping to change careers right now. But it actually shouldn’t matter to you nearly as much as you think.
　　That’s because job growth numbers don’t matter to job hunters as much as job turnover data. After all, existing jobs open up every day due to promotions, resignations, terminations, and retirements. (Yes, people are retiring even in this economy.) In both good times and bad, turnover creates more openings than economic growth does. Even in June of 2007, when the economy was still humming along, job growth was only 132,000, while turnover was 4.7 million!
　　And as it turns out, even today — with job growth near zero — over 4 million job hunters are being hired every month.
　　I don’t mean to imply that overall job growth doesn’t have an impact on one’s ability to land a job. It’s true that if total employment were higher, it would mean more jobs for all of us to choose from (and compete for). And it’s true that there are currently more people applying for each available job opening, regardless of whether it’s a new one or not.
　　But what often distinguishes those who land jobs from those who don’t is their ability to stay motivated. They’re willing to do the hard work of identifying their valuable skills; be creative about where and how to look; learn how to present themselves to potential employers; and keep going, even after repeated rejections. The Bureau of Labor Statistics data shows that 2.7 million people who wanted and were available for work hadn’t looked within the last four weeks and were no longer even classified as unemployed.
　　So don’t let the headlines fool you into giving up. Four million people get hired every month in the U.S. You can be one of them.
1. The author tends to believe that high unemployment rate ______?

A．deprives many people of job opportunities.

B．prevents many people from changing careers.

C．should not stop people from looking for a job.

D．does not mean the U.S. economy is worsening.

2. Where do most job openings come from?

A．Job growth

B．Job turnover

C．Improved economy

D．Business expansion

3. What does the author say about overall job growth?

A．It doesn’t have much effect on individual job seekers.

B．It increases people’s confidence in the economy.

C．It gives a ray of hope to the unemployed.

D．It doesn’t mean greater job security for the employed.

4. What is the key to landing a job according to the author?

A．Education

B．Intelligence

C．Persistence

D．Experience

5. What do we learn from the passage about the unemployment figures in the US?

A．They clearly indicate how healthy the economy is.

B．They provide the public with the latest information.

C．They warn of the structural problems in the economy.

D．They exclude those who have stopped looking for a job.

【推荐1】阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。
注意：每个空格只填一个单词。

If we agree that the function of education is to prepare us for life, then there is very little time to waste. So, while we can, we ought to concentrate on teaching children something really useful. Here is what our school should teach.

Politeness is a mark of civilazation. The sooner children learn this, the better. In any case, a lot can be accoplished by a smile and good manners.

Like it or not, our adult lives will be consumed by the struggle for money, but we don’t make an effort to teach children how to manage it. So our schools have a duty to teach them this ability from the beginning.

We’re likely no accept something we are told, but that’s not what educated people do. Educated people are reasonable and they look at facts. If our schools teach nothing else, they should at least teach critical(批判性的)thinking.

Children should learn to take care of their health. They should know that if they eat junk food(垃圾食品), they will become fat and unhealthy. They should be very clear about what happens to their bodies when they drink or smoke.

All of us are part of society. We have rights and responsibilities. We ought to understand what they are. We have to know a little bit of history and geography, because we need to hava an environment in which to relate to the people around us.

How will we test students on these? We can’t. But that’s not a reason to avoid teaching what is important. Our schools should spend every moment they have telling this to our children:“This is life, this is what you are going to face, and this is how you deal with it.”

Title	Very Useful     1
Introduction	Education should be a     2     for life.
Advice	Important things should be taught in    3
Teaching     4	●How to behave    5     ●The basic skill of    6     money ●How to    7     in a critical way ●How to keep    8     ●The rights and responsibilities one has in     9
Conclusion	Children should be taught what    10     is and how to deal with it.

【推荐2】Is the “Go to College” Message Overdone?
Even in a weak job market, the old college try isn’t the answer for everyone. A briefing paper from the Brookings Institution warns that “we may have overdone the message” on college, senior fellow Isabel Sawhill said.
“We’ve been telling students and their families for years that college is the only way to succeed in the economy and of course there’s a lot of truth to that,” Ms. Sawhill said. “On average it does pay off… But if you load up on a whole lot of student debt and then you don’t graduate, that is a very bad situation.”
One comment that people often repeat among the years of slow job growth has been the value of education for landing a job and advancing in a career. April’s national unemployment rate stood at 7.5%, according to the Labor Department. The unemployment rate for high-school graduates over 25 years old who hadn’t attended college was 7.4%, compared with 3.9% for those with a bachelor’s degree or more education. The difference is even bigger among those aged 16—24. The jobless rate for those with only a high school diploma in that age group is about 20%. At the same time, recent research by Canadian economists warns that a college degree is no guarantee of promising employment.
Ms. Sawhill pointed out that among the aspects that affect the value of a college education is the field of one’s major: Students in engineering or other sciences end up earning more than ones who major in the arts or education. The cost of tuition (学费) and the availability of financial aid are other considerations, with public institutions generally a better financial bargain than private ones.
She suggested two ways to improve the situation: increasing vocational (职业的)-technical training programs and taking a page from Europe’s focus on early education rather than post-secondary learning. “The European countries put a little more attention to getting people prepared in the primary grades,” she said. “Then they have a higher bar for whoever goes to college—but once you get into college, you’re more likely to be highly subsidized (资助).”
She also is a supporter of technical training—to teach students how to be plumbers, welders and computer programmers—because “employers are desperate” for workers with these skills.
1. People usually think that         .

A．the cost of technical schooling is a problem

B．technical skills are most important for finding a job

C．one will not succeed without a college degree

D．there is an increased competition in getting into a college

2. What does the underlined part “taking a page from” (in Para.5) possibly mean?

A．Learning from.	B．Changing from.
C．Differing from.	D．Hearing from.

3. What can we infer from the passage?

A．Public institutions charge more for education.

B．European universities are stricter with students.

C．Canadian students prefer to major in engineering.

D．Students with certain skills are in great demand.

4. Ms. Sawhill may probably agree that          .

A．technical training is more important than college education

B．too much stress has been put on the value of college degrees

C．a college degree will ensure promising employment

D．it’s easier for art students to find favorite jobs

【推荐1】A therapy-animal trend attracts the United States. The San Francisco airport uses a pig to calm tired travelers. Universities nationwide bring dogs (and a donkey) onto campus to relieve students during finals. And that duck on a plane? It might be an emotional-support animal prescribed by a mental health professional.

The trend, which has been gaining popularity hugely since its initial stirrings a few decades ago, is strengthened by a widespread belief that interaction with animals can reduce distress whether it happens over belief physical contact at the airport or in long-term relationships at home. Certainly the groups offering up pets think so, as do some mental health professionals. But the popular embrace of pets as furry therapists is causing growing discomfort among some researchers in the field, who say it has raced far ahead of scientific evidence.

Earlier this year in the Journal of Applied Development Science, an introduction to articles on “animal -assisted intervention” said research into its effectiveness “remains in its infancy.” A recent literature review by Molly Crossman, a Yale University doctoral candidate who recently wrapped up one study involving an 8-year-old dog named Pardner, cited a “vague body of evidence” that sometimes has shown positive short-term effects, often found no effect and occasionally identified higher rates of distress.

Overall, Crossman wrote, animals seem to be helpful in a “small-to-medium” way, but it’s unclear whether the animals deserve the credit or something else is at play.

“It’s a field that has been sort of carried forward by the beliefs of practitioners” who have seen patients’ mental health improve after working with or adopting animals, said James Serpell, director of the Centre for the Interaction of Animals and Society at the University of Pennsylvania School of Veterinary Medicine. “That kind of thing has almost driven the field, and the research is playing catch-up. In other words, people are recognizing that stories aren’t enough.”

Using animals in mental health setting is nothing new. In the 17^th century, a Quaker-run retreat in England encouraged mentally ill patients to interact with animals on its grounds. Sigmund Freud often included one of his dogs in psychoanalysis sessions. Yet the subject did not become a research target until the American psychologist Boris Levinson began writing in the 1960s about the positive effect his dog Jingles had on patients.

But the evidence to date is problematic, according to Crossman’s review and others before it. Most studies had small sample sizes, she wrote, and an “alarming numbers” did not control for other possible reasons for a changed stress level, such as interaction with animal’s human handler. Studies also tend to generalize across animals, she noted. If participants are measurably relieved by one golden retriever, that doesn’t mean another dog---or another species--will arouse the same response.

1. According to the passage, what makes the therapy-animal trend more popular?

A．It has been in existence for no less than twenty years.

B．Mental health professionals have managed to cure patients with animals.

C．It is widely assumed that staying with animals can make people happier.

D．There is much related research to show that animals do good to some patients.

2. Molly Crossman is quoted in the passage to ____

A．illustrate more scientific evidence is needed that animals are effective therapists.

B．highlight the importance of practitioners’ beliefs in the field of animal therapies.

C．question Srepell’s view that animals deserve the credit in helping patients.

D．criticize people for their taking human-animal stories too seriously.

3. What can be inferred from the passage?

A．Animal-assisted intervention turns out to be of more use than people think.

B．It is hard to see how many reasons there are for people to benefit from animals.

C．Research findings relating to one breed of dogs may not apply to another breed.

D．Small sample sizes can sometimes produce reliable effects in human-animal studies

4. Which of the following might be the best title of the passage?

A．More evidence found for dog-human relationship

B．Potential effects dogs have on patients

C．Therapeutic animal: nothing new

D．Good dog, good therapist?

【推荐2】I recently spent half a weekend sitting on the sofa watching the Davis Cup. I thought about going for a run, but I did not want to miss the rest of the match. Soon it was starting to get dark, so I did not bother (费神). Whenever I watch tennis, I think how nice it would be to play it regularly. But I have been thinking that for almost 20 years without actually setting foot on a court. The evidence would suggest that I’m not the only one.

When a country or city competes to host an international sporting event, it often promises that more people will take up sports as a result. London was no exception. Tessa Jowell, who helped to bid for (申办) the 2012 Olympics for London, said that by 2012 two million more people would be physically active. And 60 percent of young people would be doing at least five hours of sports per week.

In the end, just over one-third of people in Britain take part in sports once a week. A report on Olympic and Paralympic influences has said that a big change in participation levels simply has not happened.

Why isn’t there a big increase in people taking part in sports after most sporting events? Perhaps it is a mistake to assume a definite link between watching sports and playing it. While the games are on, they actually encourage people to do just the opposite — to spend whole sunny days not out playing sports, but inside sitting on the sofa with the curtains shut to stop the sun shining on the TV screen. We don’t expect half the audience of a hit musical to apply to drama school the next day, yet we seem to expect it of sporting events.

The high-level performances on show only remind people that they could never match the excellent athletes in their sporting achievements even if they trained full time.

Maybe participation in sports is not the right thing to expect after a major sporting event. The Olympics can do many things, but maybe this cannot necessarily be one of them.

1. How does the author introduce the topic?

A．By sharing experiences.	B．By asking questions.
C．By listing figures.	D．By analyzing causes.

2. What can we infer from paragraph 4?

A．Watching sports is closely linked with playing it.

B．Watching games discourages people from going out.

C．Watching games encourages people to take part in sports.

D．Half the audience of a hit musical will take part in drama soon.

3. What might be the best title of the text?

A．Do people like participating in sporting events?

B．Do people prefer watching big sporting events?

C．Do the Olympics encourage people to match athletes?

D．Do big sporting events make us do more sport?

4. What’s the author’s attitude towards the possibility of people’s participating in sports after big events?

A．Positive.	B．Negative.
C．Uncertain.	D．Objective.

【推荐3】The World Health Organization (WHO) recently said that it planned to add gaming disorder to its new list of disease classifications, angering the gaming industry but pleasing doctors who hope it may make treatment more easily available.

Some US experts said it would make little difference when it comes to helping people with the disorder, although others said it would bring attention to a disorder that people sometimes don't recognize.

Many of us enjoy video games, but does playing our favorite game for a couple of hours every night mean we're suffering from gaming disorder? Not, according to the WHO.

The symptoms (症状) listed by the WHO include a lack of control over gaming, treating gaming more seriously than other life interests and daily activities, and continuing to play games despite the negative consequences that playing them might have.

“The behavior pattern is enough to result in large damage to one's personal, family, or social life,” the WHO said.

Meanwhile, Douglas Gentile of Iowa State University has carried out influential research into the cause of gaming addiction in young people.

“I and many others had assumed that gaming is not really a problem but is a symptom of other problems,” he told NBC News. Many had thought it was simply a failure of self-control.

To see if it was, Gentile's team studied a group of children who had been gaming for several years.

“We found that when kids became addicted, their anxiety increased and their grades decreased,” Gentile said.

When kids were able to back off from gaming, their symptoms disappeared, he added.

Gentile thinks medical organizations should pay attention to the WHO's suggestion.

“This isn't an issue of opinion; it's an issue of science,” he said.

“This is a major scientific and medical organization. They don't do things lightly and without reason.”

Dr Petros Levounis, chair of psychiatry at the New Jersey Medical School at Rutgers University, said that he hoped the WHO's suggestion would lead to more research into obsessive(过度的) behavior among all types of people.

“Now, there is renewed interest and excitement,” he said.

1. Which of the following is a sign of gaming disorder according to the WHO?

A．Putting games before everything else.

B．Playing games for several hours every night.

C．Having no hobbies but playing games.

D．Keeping playing until winning the games.

2. Why is Gentile's research mentioned?

A．To explain the cause of gaming addiction.

B．To show the impact of gaming disorder.

C．To show the reasons behind the WHO's decision.

D．To introduce the study that influenced the WHO's proposal.

3. What did Levounis think of the WHO's decision?

A．It needed further research to make it more convincing.

B．It would do little to help people with gaming addiction.

C．It would encourage new cures for gaming disorder.

D．It would encourage studies about diseases similar to gaming disorder.

4. What's the article mainly about?

A．The WHO explaining what gaming disorder is.

B．New research findings about gaming disorder.

C．The benefits of defining gaming as a disease.

D．The discussions about defining gaming disorder as a disease.

【推荐1】“Who made you T-shirt?” A Georgetown University student raised that question. Piertra Rivoli, a professor of business, wanted to find the answer. A few weeks later, she bought a T-shirt and began to follow its path from Texas cotton farms to Chinese factories to charity bin (慈善捐赠箱). The result is an interesting new book, The travels of a T-shirt in the Global Economy.

Following a T-shirt around the world in a way to make her point more interesting, but it also frees Rivoli from the usual arguments over global trade. She goes, wherever the T-shirt goes, and there are surprises around every corner, In China, Rivoli shows why a clothing factory, even with its poor conditions, means a step towards a better life for the people who work there. In the colorful used-clothing markets of Tanzania, she realizes that, “it is only in this final stage of life that the T-shirt will meet a real market,” where the price of a shirt changes by the hour and is different by its size and even color. Rivoli's book is full of memorable people and scenes, like the noise, the bad air and the “muddy sweet smell (泥土香味) of the cotton.” She says,”Here in the factory, Shanghai smells like Shallowater, Texas.”

Rivoli is at her best when making those sorts of unexpected connections. She even finds one between the free traders and those who are against globalization. The chances opened up by trade are huge, she argues, but free markets need the correcting force of politics to keep them in check. True economic progress needs them both.

1. What do we learn about Professor Rivoli?

A．She used to raise and answer questions.

B．She wears a T-shirt wherever she goes.

C．She is deeply interested in world travel.

D．She wrote a book about world trade.

2. What do we know about T-shirts in Tanzania?

A．Prices of T-shirts rise and fall frequently.

B．Used T-shirts are hard to sell.

C．Cheaper T-shirts are needed.

D．Prices of T-shirts are usually reasonable.

3. What does the word “them”underlined in the last paragraph refer to?

A．Free traders.	B．Free markets.
C．Unexpected connections.	D．Chances opened up by trade.

4. What would be the best title for the text?

A．What T-shirts Can Do to Help Cotton Farms

B．How Shanghai Smells like Texas

C．What T-shirts Can Teach Us

D．How Rivoli travels with her T-shirt

【推荐2】I'm a travel addict. I think it is very exciting to go to new places, experience different situations and see unfamiliar things. Here's what I have come up with about why travel is so fascinating.

To start with, whether we know it or not, every day is filled with anxiety about things that we don't need to worry about in the first place. Going to new places is a chance to escape from our everyday worries. For example, after a whole day at work, I am often physically and mentally exhausted and start to worry about things. However, the moment I get on the train or bus to my next destination. I forget all my tiredness and worries.

Next is one of the most basic concepts in travel: movement. I always take along books to read on my train trips, but in the end, only about five pages or so ever get read, because 1 just stare out of the window at the things whooshing by. Just the ability to move is pleasing. Movement also means that we are going to new places and seeing new things. But why is that important? Because experiencing new situations, people and ideas could help us to learn about new things and grow, especially when we don't have the burden of everyday worries. I have never gone on a trip and come back as the same person; I have always changed and grown through travel.

So take every type of trip you can, at every chance you get, and you will not only experience more of the world, but will become a happier person with a richer set of experiences.

1. The text is mainly about___________.

A．how to have a comfortable life

B．how to become a travel addict

C．why travel is so attractive

D．how to get rich experiences.

2. What does the underlined word "exhausted" mean in the second paragraph?

A．Angry	B．Excited.
C．Tired.	D．Weak.

3. Why doesn't the author read much on train trips?

A．Because he doesn't like reading on the train

B．Because he is distracted by the scenery.

C．Because he is too busy working to read.

D．Because he is too tired to read

4. According to the author traveling to new places offers all of the following benefits EXCEPT that___________.

A．it helps us to learn new things

B．it makes us happier people

C．it helps us to get more experiences

D．it gives us more chances to read

【推荐3】In the Amazon rainforest of Venezuela，Yanomami hunter-gatherers exist on cassava, palm hearts and wild banana. They also hunt frogs and monkeys using techniques that would have been familiar to their ancestors 11,000 years ago. The extraordinary continuity of their culture, and the fact that some of the groups have had little contact with outsiders,led biologists to wonder whether the Yanomami might reveal what the human digestive system looked like before industrialization supplied the world with processed foods and antibiotics.

In 2009, researchers had a chance to find out in a previously unknown Yanomami village. Health workers collected fecal (排泄物的) and skin samples from about 30 villagers. When researchers cultured and analyzed microbes in the feces, the scientists discovered whole categories of bacteria that were absent from the guts (肠道) of people from industrialized countries. Even more striking, they found the microbial population in the average Westerner to be about half as diverse as the community inside these hunter-gatherers. The researchers realized that the microbes might have implications beyond basic science. People's microbial communities are believed to play a role in disorders like obesity, diabetes and Alzheimer's, which shorten lives and overburden health care systems. These disorders don't trouble these preindustrial Amerindians, however. So researchers want to learn which microbes protect them and figure out how to reintroduce them in modern societies. It has the potential to affect health more profoundly than the diseevery of the fabled Fountain of Youth.

But the opportunity might be more fleeting than youth itself. “The world is becoming urban so fast.” says microbiologist Maria Gloria, co-author of a 2015 study that reveals the Yanomami microbiome. “Our lifestyles are killing microbial diversity.” And although nobody has yet determined exactly what the Yanomami mystery bugs are doing, and how they improve an individual's health，she believes that scientists need to collect and preserve as many microbes as possible in anticipation of future breakthroughs. “We cannot afford to wait,” she says, “or we'll have lost the high diversity of the human microbiome of traditional peoples before we understand how to use the microbiome to improve health. ”

1. What did the researchers find out about the villagers in 2009?

A．The hunter-gathers had a different digestive system.

B．Microbial diversity was responsible for many disorders.

C．People from industrialized countries had less diverse microbes.

D．Some categories of bacteria did not exist in those villagers' guts.

2. What does the author mean by “the opportunity might be more fleeting than youth itself”?

A．The opportunity is even more precious than youth itself.

B．The opportunity is of greater significance to modern science.

C．Compared with youth，such an opportunity seems more appealing.

D．The opportunity disappears so quickly that we can't afford to lose it.

3. What is Maria Gloria's attitude towards the preservation of many microbes?

A．Concerned.	B．Optimistic.
C．Sceptical.	D．Critical.

4. What can we infer from the passage?

A．Processed foods and antibiotics have changed human digestive system.

B．More efforts are needed to solve the mystery of Yanomami microbiome.

C．Treating diseases by introducing beneficial bacteria has been made possible.

D．The discovery of those microbes will help cure many life-threatening diseases.