1 . An impressive invention made by a 17-year-old teenager, called Anna Du, is helping to clean up small pieces of plastic from the ocean.
While walking along her local beaches in Massachusetts, the young student began collecting waste plastic bags and bottles. But what she noticed was a large number of tiny pieces of plastic or microplastics that were impossible to pick up. At just 12 years old, Du set out to solve the problem. After testing a few prototypes(原型)in her backyard, she invented a remotely operated vehicle that uses the infrared camera(红外摄像机)to detect microplastics on the ocean floor. More recently, Du has also created a simulation(模拟)model that uses artificial intelligence to predict where microplastics are located.
Du’s robot invention has earned her awards at top science fairs in the US, and she’s now a nationally recognized advocate for microplastic awareness and pollution prevention. “When I first started doing science fairs, I had no idea that a young girl without lots of money and just a little advanced engineering knowledge could make a difference in the world. I’ve learned that I truly love working on a problem that’s so much larger than me,” Du said.
Du has also released a new book to help spread the word not only about the dangers of microplastics but also about the ways to relieve the problem. Titled Microplastics &Me, the book follows Du’s own story of how she went from worrying about the environment to designing award-winning solutions. Writing for kids her own age, the young girl alerts her readers to the threat of microplastic pollution and urges them to care about the environment. The book hopes to encourage young students to get into science, technology, engineering and math(STEM)subjects and to inspire a new generation of inventors and engineers. What’s more, Du has even raised more than $7,000 to distribute the book free to kids and libraries in high-need communities.
1. What inspired Du to make the invention?| A．There was too much rubbish along the beaches. | B．The plastics were too small to collect by hand. |
| C．The sea was polluted seriously. | D．She was interested in AI. |
| A．She has a spirit of challenge. | B．She is too poor to make a difference. |
| C．She doesn’t study hard in engineering. | D．She wins international recognition. |
| A．Innovation. | B．Voice. | C．Culture. | D．Art. |
| A．To inspire readers to share their stories. |
| B．To raise the awareness of microplastics pollution. |
| C．To encourage high schools to offer STEM subjects. |
| D．To collect money for kids in high-need communities. |
2 . Beginning 2020, the fifth generation of wireless technology is expected to be widely used throughout the world. The new network, called 5G, promises to give faster speeds and a higher capacity for the use of more devices. However, while some companies are competing to be the first to deliver 5G to the consumer, the environmental influences of the new network are being overlooked.
There is some evidence that the new devices and technologies associated with 5G will be harmful to ecosystems. The main component of the 5G network that will affect the earth's ecosystems is the millimeter waves. The millimeter waves that are being used in developing the 5G network have never been used at such scale(规模)before. Studies have found that there are some harms caused by these new technologies.
The millimeter waves, specifically, had a detrimental effect on birds. In a study, researchers observed that after exposure to radiation from a cell tower for just 5~30 minutes, the eggs of sparrows were disfigured. The disfiguration of birds exposed for such a short amount of time to these frequencies(频率)is significant considering that the new 5G network will have a much higher density(浓度)of base stations(small cells) throughout areas needing connection. The potential dangers of having so many small cells all over areas where birds live could threaten their population's survival.
Additionally, it was found that cellular devices were linked to many disturbances in the ecosystems of bees. In this study, beehives exposed for just ten minutes to 900MHz waves fell victim to colony collapse disorder(蜂群崩坏症候群). Bees are an incredibly important part of the earth's ecosystem. Around one-third of the food produced today is dependent on bees for pollination(授粉), making bees are a vital part of the agricultural system.
The impact that the cell towers have on birds and bees is important to understand, because all ecosystems of the earth are interconnected. If one component of an ecosystem is disrupted the whole system will be affected.
1. What will probably cause the environmental problems with the wide use of 5G network?| A．The lack of the density of base stations. |
| B．The less mature devices and technologies. |
| C．The lower capacity for the use of devices. |
| D．The large amount of use of millimeter waves. |
| A．Important. | B．Unknown. | C．Harmful. | D．Potential. |
| A．They play a key role in food production. |
| B．They can guide some pollinators to work. |
| C．They are likely to reduce unpleasant noises. |
| D．They rid disturbances in the agricultural system. |
| A．Should 5G Be Used in the Future? | B．The Influence of 5G on Ecosystem |
| C．The Research on 5G Technologies | D．How Can Ecosystem Survive 5G? |
Our world has been greatly affected by global warming and it is critical (关键的) that people, young and old, join hands to fight it. Most
It is believed that the nation should ask schools
Too many people think that global warming is not a threat, but it is one of our
Green living and green schools are part of
4 . Different ways have been applied to dealing with waste paper, specifically used newspapers. Some people put them in the recycling area, while others keep them as wrappers (包装纸). While these are both good measures, a Japanese publishing company had a better idea for their end use.
The Mainichi Newspapers Co., Ltd. invented the “Green Newspaper”, which allows people to grow plants with it. This unique newspaper was published on Greenery Day, which is focused on environmental news and made of green paper with seeds placed into it. What makes it even more special is the ink (油墨) used to print words and photos, which is made from plants. The publisher advises readers to tear the used newspaper into small pieces and plant them in a container with soil. They should water them, like they would do for any plant. Within a few weeks, the seeds will grow into plants.
This brilliant concept was invented by Dentsu Inc., one of Japan’s most famous advertising companies, which works with the publishing company on the initiative (倡议). The publisher’s belief is environmental sustainability (持续性). As its mission statement says, “The Mainichi doesn’t take action only through information, but also by solving global issues.” With joint efforts, this initiative has reached the corners of Japan and sold around millions of copies daily. Other such initiatives producing plantable paper are also seen in India and the US.
About 95 million trees are lost for producing newspapers every year. The Internet, the number of whose users stands for 62.5 percent of the population worldwide, has influenced how people read news and the print readership has dropped greatly. However, the reinvention and reimagination of this newspaper will bring about a change in the publishing industry as well as having an environmental influence.
1. Why was the Green Newspaper invented?| A．To get newspapers cheaper. | B．To make the most of waste paper. |
| C．To improve the printing. | D．To advertise the publishing company. |
| A．It uses high-tech materials. | B．It provides energy for seeds. |
| C．It’s printed with plant-based ink. | D．It’s published to celebrate Greenery Day. |
| A．It’s easier said than done. | B．Everything comes to one who waits. |
| C．Many hands make light work. | D．Actions speak louder than words. |
| A．About 59 million trees are lost for producing newspapers. |
| B．The Internet has changed the way people read news totally. |
| C．The popularity of the Internet leads to the fall of the print readership. |
| D．The “Green Newspaper” will encourage more people to protect the environment. |
5 . There has been a dramatic increase in the number of natural disasters over the past few years, and it is assumed that global warming and climate change could cause even more disasters in the future. Some of the world’s leading cities are facing disasters like floods and heat waves.
London
London’s flood defences are getting older. Since 1982, the Thames Barrier(水闸)has protected the city from the threat of flooding, but it was only designed to last until 2030 and close once every two or three years. About 26 years later, the barrier now closes five or six times a year and according to Environment Agency predictions, by 2050 the barrier will be closed on almost every tide if the problem is not addressed.
There are 26 underground stations, 400 schools, 16 hospitals, an airport and 80 billion worth of property in London’s flood risk area, so large scale flooding would be disastrous.
Paris
Over a sixweek period in July and August 2003, more than 11, 400—mainly elderly people—died in France from dehydration(脱水)and extremely high body temperature in a deadly heat wave. Heat waves of similar intensity(强度)are expected every seven years by 2050, so what can be done to make sure such a disaster does not happen again?
One solution is to have airconditioners installed in elderly care homes. But this is considered a shortterm solution, as the increase in demand for electricity also increases carbon emissions(排放)．
In Paris the local authorities are encouraging architects to design new types of buildings such as the building “Flower Tower”, which uses a covering of bamboo to act as a natural airconditioner.
Shanghai
Shanghai is one of the fastest growing cities on Earth. It has a population of 18 million and is only 4 meters above sea level. Sea levels are predicted to rise by 20 cm within the next century.
An estimated 250，000 people move to Shanghai every year in search of work, placing extra demands on energy consumption. China relies heavily on coalfired power stations, but these emissions increase temperatures and, in turn, warmer seas increase the risk of typhoons.
1. What problem should be settled now in London?| A．How to protect the city’s property. |
| B．Where to build its flood defences. |
| C．How to use the Thames Barrier to protect the city. |
| D．How to improve the function of the old flood defences. |
| A．Putting up new types of buildings with a covering of bamboo. |
| B．Having airconditioners installed in elderly care homes. |
| C．Forbidding the city to build “Flower Tower”． |
| D．Encouraging architects to design new types of buildings. |
| A．to tell us how to protect the big cities |
| B．to give advice on how to defend natural disasters |
| C．to explain what causes flood and heat waves |
| D．to warn us of the increasing natural disasters in big cities |
| A．Big Cities Facing Big Disasters |
| B．Big Disasters in the Future |
| C．The Increase of Natural Disasters |
| D．Solutions to Natural Disasters |
6 . The victims were carried in one by one,their paws and fur burned,suffering from dehydration(脱 水）and fear.Their caretakers
Koalas,unlike kangaroos,birds or snakes,do not
But during big fires,such as those that have burned in recent weeks,the animals are far less likely to
The tough situation of the koala has raised
We have these
| A．touched | B．treated | C．ignored | D．discovered |
| A．threw | B．locked | C．laid | D．forced |
| A．familiar | B．plentiful | C．beautiful | D．expensive |
| A．reached | B．left | C．burned | D．trapped |
| A．killed | B．recognized | C．hurt | D．rescued |
| A．flat | B．black | C．broad | D．safe |
| A．escape | B．die | C．suffer | D．rise |
| A．balance | B．protection | C．challenge | D．comfort |
| A．attack | B．come | C．pass | D．avoid. |
| A．jump | B．climb | C．fall | D．survive |
| A．top | B．leaves | C．trunk | D．root |
| A．passion | B．concern | C．fear | D．interest |
| A．chances | B．choices | C．neighbors | D．threats |
| A．weakening | B．developing | C．enriching | D．ensuring |
| A．lonely | B．stupid | C．lazy | D．unique |
7 . Imagine an area 34 times the size of Manhattan. Now imagine it covered ankle-deep in plastic waste—a total of about 19 billion pounds of garbage.
“We’re being overwhelmed(淹没) by our waste,”said Jenna Jambeck, an environmental engineer who led the 2015 study that determined this astonishing number.
Plastic—a widely-used material—has in many ways been a benefit to humans but it has also caused a growing problem. Today, plastics are the No.1 type of garbage found in the sea. Ocean Conservancy, a nonprofit that organizes an annual coastal cleanup event worldwide, said plastic waste makes up around 85 percent of the garbage collected from beaches and oceans.
Ocean Conservancy says plastics are believed to threaten(威胁)at least 600 different wildlife species(物种).
| A．The following is what we should do |
| B．And it’s not just wildlife that’s threatened |
| C．And this figure is likely to double by 2025 |
| D．But it’s not just countries that need to do their part |
| E．By 2050,that figure is expected to rise to 1000 pieces |
| F．That’s how much plastic waste ends up in our oceans every year |
| G．All of us have an important role to play in dealing with the problems |
8 . Nobody wants to snack on plastic bags or soda rings, but according to a recent study from the University of Neweastle, we could be consuming roughly a credit card's worth of plastic every week.
Microplastic, which are less than a quarter-inch size and come in various shapes, have polluted the natural world and infiltrated(渗入)our bodies. The first clue to microplastic exposure in humans came around 2013, when scientists discovered plastic particles in seafood prepared for consumption. But in 2019, when the University of Newcastle study was published, the scientific community understood that the problem was considerably broader. Microplastics shed off clothes and tires and have been found in beer, honey, table salt and other food items. We breathe in plastic staying in the air and drink plastic floating in our drinks. It's no stretch to conclude that our exposure is significant. What we don't know is what this means for us.
The amount of evidence collected on this subject is growing rapidly, according to Scott Coffin, a toxicologist(毒理学家). Studies done on mice and rats have found that plastic in their bodies can severely damage cells and cause stress.
Because microplastics are too small to clean up, the only solution is to stop plastic waste at the source. And doing so would take a thorough adjustment, given that plastics are deeply embedded in our economy and lifestyle. Stopping using them would fundamentally affect countless industries, including textiles(纺织业), transportation and manufacturing.
"I think we need to have more studies coming out that are directly related to human health before we see a lot more concern from the general public," Scott said. "It takes a lot to convince people that something that is really convenient for them to use is something they should sacrifice."
The question of microplastics and human health needs more attention—from the scientific community ,the general public, the government and funding groups. The issue isn't being ignored, but it's not being prioritized either.
1. What does the second paragraph mainly tell us about microplastics?| A．Their wide usage in daily life. |
| B．Their harm to human health. |
| C．Their significant exposure in humans. |
| D．The new study conducted on them. |
| A．The way that microplastics exist. |
| B．The pollution caused by microplastics. |
| C．The relationship between microplastics and human health. |
| D．The reason for the existence of microplastics. |
| A．To cut down plastic production. |
| B．To carry out more studies on mice and rats. |
| C．To invent something more convenient than plastics. |
| D．To promote people's awareness on the harm brought by microplastics. |
| A．Is Microplastic pollution harmful to our health? |
| B．Why is Microplastic pollution everywhere? |
| C．Why is plastic harmful? |
| D．What do you know about Microplastics? |
9 . Among the world’s waste-recycling pioneers, Germany is the leader. The country has quite a detailed way of sorting their waste-down to the color of glass waste, the type of paper, the separate bin for metals, etc.
Here below are what you should know about Germany’s waste sorting system：
◇You are expected to gather your waste in your apartment/housing area’s local public garbage bins.
◇There are commonly several types of public garbage bins available in the German’s apartment/housing areas：
Blue bin — for paper and cardboard
Green and white bin — for glass, different bins for differently colored glass, not available for holiday decorations and lights
Yellow/orange bin — for plastic and metals
Brown bin — for goods that can be changed naturally by bacteria into substances that don’t harm the environment, like leftovers, fruit and vegetables
Gray/black bin — for everything else that can’t be recycled such as used cat litter and animal waste
◇Some items don’t belong in these public garbage bins. Items like used batteries, electronics, unused paints, and lights must be returned to the special agent/locations so they can be properly recycled. Other items such as clothes, shoes, and oversized rubbish and furniture are advised to be donated or sold.
◇There’s this thing called Pfand in Germany, a certain part of the price for a bottled drink that you get back if you send back the bottle to certified (有资历的) shops. German law requires shops over a certain size selling bottled drinks have a Pfandruckgabestelle, or place for bottles with deposits (押金). These bottles usually made of glass or plastic will be refilled. Of course, there’re strict health regulations.
1. Which bin should the fallen leaves be classified into？| A．The blue bin. | B．The brown bin. |
| C．The grey/black bin. | D．The green and white bin. |
| A．By returning it to special agents. | B．By placing it in a specific location. |
| C．By giving it away to those in need. | D．By donating it to a Pfandruckgabestelle. |
| A．To collect money for some shops. | B．To help shops reuse plastic or glass. |
| C．To reduce the broken bottles. | D．To encourage bottles to be returned. |
10 . Organic farms use no man-made chemicals to increase crops or control insects and disease and organic fields produce fewer crops, on average, than other fields. However, agricultural scientists in Switzerland have displayed the long-term effect of organic farming methods, that is, the organic methods improved the health of the soil and used half as much energy.
The Swiss scientists compared the effects of organic and traditional farming methods over a period of more than twenty years. They grew crops on four fields of land in Switzerland. Two fields were grown using traditional farming methods. The others were grown using organic farming methods. The crops and soil use were similar in all the fields studied.
The study found that the organic fields produced about 20% fewer crops than the other fields. However, the farmers used less fertilizer (化肥) and energy on the organic fields. They found the organic fields were healthier.
The scientists say the organic fields have more nutrients in the soil. The soils in the organic fields also have more biological activity than the other fields. The organic fields have more helpful organisms and a larger number of different organisms. The organic fields have almost two times as many insects, including helpful insects. In traditional farming, chemicals designed to kill harmful insects also kill helpful ones.
The researchers say the findings show that organic crop production rates change little over time, and that soil fertility increases. They say the findings suggest that organic farms can help the environment by increasing soil fertility.
Organic farming is becoming increasingly popular in some countries. Many people believe that eating organic food is more healthful than eating food grown with chemicals. Some people are willing to pay more money to buy organic food.
1. What does the study show about the organic methods?| A．They have more output than other fields. |
| B．They use more energy than traditional ones. |
| C．They benefit human health and nature. |
| D．They can control diseases without using chemicals. |
| A．Selecting the best seeds. | B．Applying different methods. |
| C．Using the latest technology. | D．Planting crops in special soils. |
| A．Its shortage. | B．Its products. | C．Its application. | D．Its strengths. |
| A．Organic farming is environment-friendly. |
| B．No insects exist in organic fields. |
| C．People can’t afford organic food at present. |
| D．Organic crop production rate increases rapidly. |
