1 . A study from 2010 said that raising prices by 1% without losing sales can increase profits by 8.7% on average. Getting the prices right can be difficult. Set them too high and you lose customers; set them too low and you leave money on the table.
To make more money, shopkeepers have been turning to price-optimization (优化) systems that predict how customers will respond to price changes. These systems are becoming cleverer thanks to advances in artificial intelligence (AI). While older systems used historical sales data to estimate (估计) price sensitivity for individual goods, the latest AI-powered systems can find relationships between multiple goods. These AI-powered systems use big data to estimate price sensitivity — how much demand increases as the price falls or how much demand decreases as the price goes up-for thousands of products. Price-sensitive (价格敏感的) goods can then be discounted and price-insensitive ones marked up.
All this makes pricing systems “much more three-dimensional”, observes Chad Yoes, the pricing official at Walmart, a supermarket. In February, Starbucks, a chain of coffee shops, expressed pride in its use of AI to price products “on an ongoing basis”. US Foods, a food company, says its pricing system can promote sales and profits.
Price-optimization may make prices change more. “Shopkeepers are pricing faster today than they ever have before,” says Matt Pavich of Revionics, a pricing-software firm. That is especially true in the fast-moving world of e-commerce. But even Walmart changes the prices of many items in its stores 2-4 times a year, says Mr Yoes. up from once or twice a few years ago.
Sysco, a food company, says the AI-powered system allows it to lower prices on “key value items” and raise prices on other products. It can thus increase profits by expanding sales while maintaining profits. That keeps investors content and shoppers sweet.
1. What can be learned from the first paragraph?| A．It is sometimes difficult to set the right prices. |
| B．Getting the prices right can make you lose customers. |
| C．Raising prices by 1% always leads to an 8.7% increase in profits. |
| D．The study from 2010 suggests that you leave money on the table. |
| A．They are more price-sensitive. |
| B．They make prices change more. |
| C．They can predict price sensitivity for individual goods. |
| D．They are able to identify links between various products. |
| A．Starbucks coffee. | B．Price-insensitive goods. |
| C．Walmart’s online goods. | D．Sysco’s “key value items”. |
| A．Apply AI to Set Prices | B．Raise Prices to Increase Profits |
| C．Reduce Prices to Promote Sales | D．Use AI to Predict Customer Response |
2 . Squaw Peak, with its breathtaking scenery, has attracted numerous hikers. But
Henry Grant was well
After 15 minutes of pushing past bushes and slipping down, Grant spotted Paula crumpling (瘫倒) on a small flat rock. He called 911 to
About 45 minutes later, first responders arrived. They carried Paula on a stretcher (担架) to a waiting ATV and sent her to a hospital.
Paula, who has fully
| A．injury | B．danger | C．pain | D．fortune |
| A．proud | B．innocent | C．ignorant | D．aware |
| A．stayed | B．jumped | C．walked | D．lived |
| A．impress | B．disturb | C．enjoy | D．prefer |
| A．fantastic | B．desperate | C．disappointed | D．enthusiastic |
| A．extended | B．wheeled | C．facilitated | D．guaranteed |
| A．anywhere | B．somewhere | C．nowhere | D．elsewhere |
| A．sight | B．position | C．route | D．location |
| A．predicting | B．imagining | C．deciding | D．hoping |
| A．report | B．find | C．determine | D．check |
| A．found | B．grasped | C．saved | D．reached |
| A．examinations | B．operations | C．measures | D．means |
| A．nervously | B．tightly | C．gently | D．silently |
| A．free | B．comfort | C．distract | D．spare |
| A．improved | B．recovered | C．returned | D．survived |
3 . Of the 8,300 million tons of virgin (原始的) plastic produced up to the end of 2015, 6,300 million tons have been discarded (丢弃). Most of that plastic waste is still with us, buried in landfills or polluting the environment. Microplastics have been found in Antarctic sea ice, in the guts of animals that live in the deepest ocean trenches and in drinking water around the world.
But what if we could wave a magic wand and remove all plastics from our lives? For the sake of the planet, it would be a tempting prospect — but we’d quickly find out just how far plastic has spread to every aspect of our existence.
In hospitals, the loss of plastic would be devastating. “Imagine trying to run a dialysis (透析) unit with no plastic”, says Sharon George, senior lecturer in environmental sustainability and green technology at Keele University in the UK. Plastic is used in gloves, tubing, blood bags, sample tubes and more.
Some everyday plastic items are also vital for protecting health. Face masks, including plastic-based surgical masks and respirators (人工呼吸器), as well as reusable cloth masks, have helped slow the spread of the COVID-19 virus. “A mask that you have for COVID is related to our safety and the safety of others,” says George. “The impact of taking that away could be loss of life if you took it away on a big scale.”
Our food system would also quickly come apart. We use packaging to protect food from damage in transit and preserve it long enough to reach supermarket shelves, as well as for communication and marketing. “I cannot imagine how plastic would be replaced completely in our system,” says Eleni Iacovidou, a lecturer in environmental management at Brunel University London.
Swapping out plastic packaging would have knock-on (产生连锁反应的) environmental effects. While glass has some advantages over plastic, such as being endlessly recyclable, a one-liter glass bottle can weigh as much as 800 g compared to a 40 g plastic one. When those heavier bottles and jars need to be transported over long distances, carbon emissions grow even more.
It’s clear that replacing one material with another won’t solve all our plastic problems.
1. What is the purpose of the first paragraph?| A．To give a definition. | B．To report on a study. |
| C．To introduce a topic. | D．To describe a phenomenon. |
| A．Interesting. | B．Practical. | C．Predictable. | D．Destructive. |
| A．Doubtful. | B．Supportive. | C．Optimistic. | D．Uninterested. |
| A．What if we stopped using plastic? |
| B．Is plastic packaging bad for the environment? |
| C．More recycling won’t solve plastic pollution |
| D．Swapping out plastic for sustainable living |
4 . Alarming levels of dangerous chemicals known as Perfluorinated Alkylated Substances (PFAS) were discovered in food packaging at a number of well-known fast-food restaurants and grocery store chains, a new report found. The report comes more than two years into the Covid-19 pandemic, when the public has relied heavily on takeout and grocery deliveries.
Often called “forever chemicals” because they do not break down in the environment, PFAS are used in food packaging to prevent grease (油脂) and water from soaking through food wrappers and cups. PFAS can also be found in the ink used to print logos and instructions on food containers.
The US Centers for Disease Control and Prevention calls exposure to PFAS a “public health concern”, citing that the human-made chemicals can harm the immune system and reduce a person’s resistance to infectious diseases.
Regulatory limits for how much PFAS food packaging should contain can vary greatly. For instance, a new law in California set the limit at less than 100 ppm. “Compared to America, Denmark sets a much lower regulatory limit of 20 ppm with great success,” said Xenia Trier, an expert at the European Environment Agency. “It does work to set limits and enforce them. PFAS do migrate from the paper into the food. Even though it was not 100%, we still saw considerable transmission. In general, transmission from packaging to food is increased as the temperature of the food rises. It is the same with the time spent in wrapping materials.” Trier told NBS, one of the major American mass-media companies.
In response to the issue, Whole Foods became the first grocery chain to publicly commit to remove PFAS from takeout containers and bakery paper. Many other companies followed suit. Experts say people who want to avoid PFAS in their takeout and food delivery packaging should favor companies that have promised to remove the chemicals. “As soon as you receive your takeout, you’d better take food out of the container immediately, and never reheat food in its original container. Instead, remove your food and heat it in ceramic (陶瓷的) or glass containers.” Trier said.
1. What can we learn about PFAS in food packaging?| A．They have been used for two years. |
| B．They do little harm to consumers’ health. |
| C．They are used to break down the chemicals. |
| D．They can make wrappers resistant to grease and water. |
| A．Favorable. | B．Neutral. |
| C．Ambiguous. | D．Opposed. |
| A．Considerable migration of grease and water. |
| B．PFAS transmission from packaging to food. |
| C．Wrapper exposure to high food temperature. |
| D．Regulatory limits concerning food packaging. |
| A．Food packaging contains dangerous chemicals. |
| B．Consumers are recommended to have PFAS-free products. |
| C．PFAS found in food packaging has become a great concern. |
| D．The government has taken measures to reduce PFAS exposure. |
5 . AirTag, a small Bluetooth-and-GPS-enabled device, was released by Apple in April 2021. This small device aimed at making our lives easier was originally designed to end the trouble of losing keys, wallets or other little objects. However, it may become the “perfect” tracking tool if in the wrong hands. My ex-husband was an early adopter of the AirTag. He and I had a falling out, leading to a divorce battle. In order to win custody battle, he used the little device to track me.
As a tech giant, the Apple company brought great convenience to the users, including me. I had never given a thought to tracking via AirTag until it happened to me. So I started scanning stories about AirTag. I was surprised to find that I was not alone. There were so many people tracked by these seemingly innocent electronic tags in their daily life. AirTag which was originally launched for a better life should have such a dark side in the wrong hands.
People have found that the digital device has the potential for abuse. What matters is how to avoid its danger. Apple has released updates to the AirTag’s functionality very quickly since they hit the market. Meanwhile, Apple has also improved its customer service to deal with the bugs of this kind. If you find an unwanted AirTag following you, don’t panic. Just disable it. You can follow the prompts on your Apple device to learn more about disabling the device. Once you’ve completed the above step, the tag’s original owner can’t keep track of you any more.
Almost every digital technology creates security issues. Nobody can go and live in a cave to remain unaffected. While enjoying its convenience, you need to be aware of the risks it poses, and know how to deal with them. Prevention is more effective in security issues than fixes. After all, a stitch in time saves nine.
1. What is the original function of AirTag?| A．To track one’s location secretly. | B．To help find one’s easily lost items. |
| C．To locate one’s phone accurately. | D．To ensure the safety of one’s phone. |
| A．Her ex-husband tracked her via AirTag. |
| B．Many people suffered from security problem. |
| C．AirTag was a newly released electronic device. |
| D．She intended to know about its great convenience. |
| A．Have it updated. | B．Make it unable to work. |
| C．Pay no attention to it. | D．Contact its original owner. |
| A．People should keep pace with the times. |
| B．People should use technology in a proper way. |
| C．People should handle potential digital risks actively. |
| D．People should bear the responsibility to fix the bugs bravely. |
6 . I was young and determined to take an adventurous trip. But
Staring over the
My palms were
“Five.” They started the
“Four.”
“Three.”
“Two.” In that instant I
Then...
“One.”
I let go and leaped out as far as I could. If there had been time to
It felt as if all my fears, insecurities, and doubts were being let go. An enormous sense of
Jumping out of the cable car put me on
| A．sliding | B．jumping | C．running | D．climbing |
| A．unacceptable | B．important | C．inspiring | D．funny |
| A．bottom | B．edge | C．middle | D．ceiling |
| A．correctly | B．frequently | C．barely | D．actually |
| A．talked | B．looked | C．checked | D．turned |
| A．warm | B．dry | C．sweaty | D．icy |
| A．encouragement | B．order | C．process | D．countdown |
| A．changed | B．fixed | C．focused | D．made |
| A．attempt | B．decision | C．destination | D．stage |
| A．Untie | B．Hold | C．Unfold | D．Catch |
| A．approve of | B．complain of | C．think about | D．dream about |
| A．uncertainty | B．freedom | C．trust | D．panic |
| A．head | B．hands | C．feet | D．back |
| A．screaming | B．waving | C．claiming | D．applauding |
| A．end | B．top | C．outside | D．center |
7 . As a boy, John Kerr wanted to be a park ranger (护林员).
After several lazy weeks, he drove to visit his family by Yellowstone. On the way he
To say that Kerr stood out in the intern crowd is a massive
From his internship, he
“These are
| A．Instead | B．Anyhow | C．Still | D．Hence |
| A．retired | B．departed | C．graduated | D．resigned |
| A．at random | B．on purpose | C．on time | D．by chance |
| A．helping | B．requiring | C．training | D．hiring |
| A．signed up | B．moved on | C．hang out | D．broke in |
| A．honour | B．understatement | C．relief | D．overstatement |
| A．delighted | B．determined | C．contented | D．prepared |
| A．travel | B．nature | C．drive | D．freedom |
| A．business | B．guidance | C．emergency | D．conference |
| A．turned to | B．went with | C．moved up to | D．kept up with |
| A．encounters | B．places | C．trips | D．experiences |
| A．judges | B．treasures | C．admires | D．changes |
| A．open | B．anxious | C．up-close | D．all-round |
| A．effort | B．occasion | C．imagination | D．adventure |
| A．rich | B．natural | C．urgent | D．easy |
8 . “You should get a cat, ”my therapist(治疗专家)said. “A cat?” I couldn’t even look after myself. . I took a deep breath and carefully considered the idea of welcoming a feline (猫科的)friend into my life. This seemed like too easy a fix for the fact that I couldn’t leave the house without bursting into tears.
When my partner and I found Cinnamon, her adoption profile made her out as the perfect kitten. We filled out the paperwork and prepared for her arrival.
When she came home, it became increasingly obvious that Cinnamon didn’t understand “no”, “stop it” or “don’t do that”. She was the worst cat I’ve ever owned. I was beginning to doubt my therapist’s advice.
After visiting our vet, she concluded that Cinnamon just wanted our attention. She fought tooth and nail to get a bite of our meals. She’d fearlessly lick sharp knives when left unattended for a split second. Cinnamon stole my heart with her bravery and kept me busier than I’d ever expected.
We decided to start taking her for walks. I could barely leave the house before, but my heart couldn’t say no to Cinnamon. Cinnamon showed me what bravery looked like. She didn’t stop to consider every possible outcome of a situation; she simply went for it. If there was a dog at a park, she would run toward it. She jumped without knowing where she would land. She loved adventure. I found myself mirroring her behavior after a while, jumping out of bed without a second thought. I began to find the motivation to get out of bed in the morning.
Cinnamon unfortunately passed away after a medical accident. I’m no stranger to sadness or grief, but losing my pet so suddenly was the most confusing emotional experience I’ve had to date. She no longer wakes me up at 5 am begging for breakfast, but she’s still the reason I get up every morning.
Our time is often cut unpredictably, unmistakably short. It would be a shame to live life being anything less than brave and adventurous.
1. Why did the author’s therapist recommend that she get a cat?| A．To learn how to interact with animals. | B．To help the author fill up her spare time; |
| C．To solve the author’s fear of going out. | D．To distract the author’s attention from her pain. |
| A．Thrilled. | B．Amazed. | C．Pleased. | D．Disappointed. |
| A．Walking Cinnamon outdoors became an adventure for the author. |
| B．The author was positively affected by Cinnamon’s courageous behavior. |
| C．Cinnamon loved going outside and took consequences into consideration. |
| D．The author decided to take Cinnamon outside as she was too troublesome to stay in. |
| A．Life is short and unpredictable. | B．The loss of a pet can be painful. |
| C．We should have the courage to take risks. | D．Animal-assisted therapy is the best cure for mental illness. |
9 . Saying farewell to someone you love, even for a night, can be difficult, much less saying goodbye for a lifetime or forever in death. Juliet bid Romeo adieu (再见) for the evening with the words, “Parting is such sweet sorrow.” Sweet sorrow is an oxymoron. But this seeming contradiction is true in the context of relationships.
Relationships are based on feelings, emotions, and passion. Deep friendships and loving relationships are measured by the level of emotional attachment. Emotions intensify over time. People spend time with the people they like. The more one person likes another person, the closer the relationship becomes. Each person in the relationship receives an emotional benefit from knowing the other person.
Saying goodbye means separating from the people who make up a significant part of your emotional identity. Separation, even a temporary absence, from the people you have a deep emotional connection with can cause sorrow because you will no longer be able to enjoy their company.
The sweet side of saying goodbye is the emotional fulfillment of being in a close relationship. The time spent together is emotionally rewarding, especially if that person is seen as a soulmate. Humans are social beings. We seek the love and comfort of other people. Loneliness devastates the human condition and leads to sadness. Sad people will do anything they can to find fulfilling relationships. Likewise, happy people will do anything they can to maintain or enhance relationships. Herein lies the essential point of the emotional problem.
The more intense relationships become, the more devastating the emotional loss that is felt upon separation. The exhilaration of relationships cannot be truly measured without experiencing the overwhelming loss of a deep emotional connection.
Enjoy the company of the person you are with as long as you can; knowing the pain you will feel at the end of the relationship is the true measure of the relationship. If it doesn’t hurt to say goodbye, perhaps it wasn’t worth saying hello.
1. Which of the word group can create the same effect as “sweet sorrow”?| A．icy cold | B．clicking sound | C．deafening silence | D．endless speech |
| A．Saying goodbye is unavoidable in our daily life. |
| B．The companion of close friends can lessen sorrow. |
| C．A person’s identity is connected with relationship. |
| D．Separation is the sorrowful part of saying goodbye. |
| A．Making more communication with others. |
| B．Building deep emotional connections with others. |
| C．Comforting friends with love and intense feelings. |
| D．Being a thoughtful person by standing in others’ shoes. |
| A．Sweet sorrow is very common in close relationships. |
| B．The pain of separation is the measure of relationships. |
| C．Human beings are eager to get emotional fulfillment. |
| D．Happiness is meaningless without sadness to compare it. |
10 . According to the Solar Energy Industry Association, the number of solar panels installed(安装)has grown rapidly in the past decade, and it has to grow even faster to meet climate goals. But all of that growth will take up a lot of space, and though more and more people accept the concept of solar energy, few like large solar panels to be installed near them.
Solar developers want to put up panels as quickly and cheaply as possible, so they haven’t given much thought to what they put under them. Often, they’ll end up filling the area with small stones and using chemicals to control weeds. The result is that many communities, especially in farming regions, see solar farms as destroyers of the soil.
“Solar projects need to be good neighbors,” says Jordan Macknick, the head of the Innovative Site Preparation and Impact Reductions on the Environment (InSPIRE)project. “They need to be protectors of the land and contribute to the agricultural economy.” InSPIRE is investigating practical approaches to “low-impact” solar development, which focuses on establishing and operating solar farms in a way that is kinder to the land. One of the easiest low-impact solar strategies is providing habitat for pollinators(传粉昆虫).
Habitat loss, pesticide use, and climate change have caused dramatic declines in pollinator populations over the past couple of decades, which has damaged the U.S. agricultural economy. Over 28 states have passed laws related to pollinator habitat protection and pesticide use. Conservation organizations put out pollinator-friendliness guidelines for home gardens, businesses, schools, cities—and now there are guidelines for solar farms.
Over the past few years, many solar farm developers have transformed the space under their solar panels into a shelter for various kinds of pollinators, resulting in soil improvement and carbon reduction. “These pollinator-friendly solar farms can have a valuable impact on everything that’s going on in the landscape,” says Macknick.
What do solar developers often ignore?
| A．The decline in the demand for solar energy. |
| B．The negative impact of installing solar panels. |
| C．The rising labor cost of building solar farms. |
| D．The most recent advances in solar technology. |
