1 . Natural selection is the process by which one type of animal within a species thrives (兴旺) because of certain characteristics that make it more likely to live than others in its group. The history of the peppered moth (灰蛾) is an example of the natural selection process.
In nineteenth-century England, certain types of peppered moths were able to better blend (融合) into their surroundings. During that time period, great changes were happening in Great Britain. The Industrial Revolution was part of this change, and with it came air pollution. Natural selection often takes hundreds or even thousands of years to occur. For the peppered moth, this process occurred comparatively quickly.
At the beginning of the Industrial Age, most peppered moths in England were light-colored and covered with black markings, although a few moths had dark-colored wings. Because the light-colored moths blended into the light-colored bark on the trees, they could not be easily seen by birds that would eat them. As the air grew more polluted, however, tree trunks became covered with soot (煤烟) and became darker. The light-colored moths became easy for birds to see against the dark tree trunks. Since the dark-colored moths now had the advantage, their numbers grew. Within 50 years, the peppered moth went from being mostly light-colored to being mostly dark-colored.
In the twentieth century, the air cleared up, and the peppered moth population changed again. As tree trunks lightened due to less soot in the air, light-colored moths once again had an advantage. Their numbers increased as soot levels declined. Depending on their environment, the coloration of the moths helped them to be “naturally selected” to survive.
1. What do we know about the peppered moth’s natural selection process?| A．It was a good example of environmental protection. |
| B．The soot levels in England did not affect it. |
| C．This type of color change was typical for moths. |
| D．The length of time was unusual. |
| A．Both kinds of moths preferred the dark-colored trees. |
| B．Birds failed to see light-colored moths. |
| C．There were more light-colored moths than dark-colored moths originally. |
| D．The color of moths was unimportant. |
| A．Birds would eat fewer moths. |
| B．The population of dark-colored moths would increase. |
| C．Moths would not be able to stay alive. |
| D．Light-colored moths would disturb people’s life. |
| A．there were always many peppered moths |
| B．birds preferred to eat dark-colored moths |
| C．trees changed colors to adapt to the environment |
| D．birds were dangerously affected by the soot levels |
2 . One of the problems damaging our planet is the number of things we throw away. A more recent addition to the list of things we throw away is e-waste — electronic items that are broken and not recycled.
Recently, there’s a growing trend for repair events and clubs which could be part of a solution to the growing amount of electrical and electronic junk. The BBC visited a Restart Project in London, which is one of many found around the world. One of its operators, Francesco Calo, said that “This project makes total sense.
| A．First of all, this project prolongs the life of electric objects |
| B．It is partly because it’s cheaper to replace them than fix them |
| C．It is reported that many people have made a big fortune from it |
| D．Now solutions have been put forward to give this e-waste a new life |
| E．So it’s thought that doing this could be more profitable than traditional recycling |
| F．As many electrical items contain valuable metals, another solution is e-waste mining |
| G．One of the reasons is that people don’t think their electronic items are fashionable enough |
3 . You’ve heard that plastic is polluting the oceans — between 4.8 and 12.7 million tonnes enter ocean ecosystems every year. But does one plastic straw or cup really make a difference? Artist Benjamin Von Wong wants you to know that it does. He builds massive sculptures out of plastic garbage, forcing viewers to re-examine their relationship to single-use plastic products.
At the beginning of the year, the artist built a piece called “Strawpocalypse,” a pair of 10-foot-tall plastic waves, frozen mid-crash. Made of 168,000 plastic straws collected from several volunteer beach cleanups, the sculpture made its first appearance at the Estella Place shopping center in Ho Chi Minh City, Vietnam.
Just 9% of global plastic waste is recycled. Plastic straws are by no means the biggest source (来源) of plastic pollution, but they’ve recently come under fire because most people don’t need them to drink with and, because of their small size and weight, they cannot be recycled. Every straw that’s part of Von Wong’s artwork likely came from a drink that someone used for only a few minutes. Once the drink is gone, the straw will take centuries to disappear.
In a piece from 2018, Von Wong wanted to illustrate (说明) a specific statistic: Every 60 seconds, a truckload’s worth of plastic enters the ocean. For this work, titled “Truckload of Plastic,” Von Wong and a group of volunteers collected more than 10,000 pieces of plastic, which were then tied together to look like they’d been dumped (倾倒) from a truck all at once.
Von Wong hopes that his work will also help pressure big companies to reduce their plastic footprint.
1. What are Von Wong’s artworks intended for?| A．Beautifying the city he lives in. | B．Introducing eco-friendly products. |
| C．Drawing public attention to plastic waste. | D．Reducing garbage on the beach. |
| A．To show the difficulty of their recycling. |
| B．To explain why they are useful. |
| C．To voice his views on modern art. |
| D．To find a substitute for them. |
| A．Calming. | B．Disturbing. |
| C．Refreshing. | D．Challenging. |
| A．Artists’ Opinions on Plastic Safety |
| B．Media Interest in Contemporary Art |
| C．Responsibility Demanded of Big Companies |
| D．Ocean Plastics Transformed into Sculptures |
4 . Coffee chains create a lot of waste, from disposable take-away cups to the used grounds that are sent to landfills. Starbucks has started to try recyclable alternatives to the disposable cups. But the used coffee is often unnoted.
The world drinks around 2 billion cups of coffee a day, producing 6 million tons of used grounds every year. When they go to landfills, the grounds release greenhouse gases into the atmosphere, contributing to global warming.
UK Bio-bean has found a way to turn that waste into a valuable resource. At Bio-bean, used coffee grounds are processed to remove paper cups or plastic bags, and then passed through a dryer and a further screening process. They are finally processed into the fuel. Coffee Log.
"Coffee is highly calorific and lends itself to being a really fantastic fuel," says May. director of Bio-bean. "They burn about 20% hotter and 20% longer than wood logs do."
While these fuels release greenhouse gases when burned, if they replace other carbon-based fuels. Bio-bean estimates that the recycling process reduces emissions （排放）by 80% compared with sending the grounds to landfills.
Founded in 2013 Bio-bean grew rapidly, launching coffee collection services across the UK and building the world's first coffee recycling factory only two years later. In 2016 they launched their first product, Coffee Log, and are now ready to launch their first natural flavouring ingredient into the food and drink industry.
“We've really managed to succeed with our innovation because we've managed to get to scale. What started as a good idea is today the UK's largest recycler of coffee grounds. We are turning 7,000 tons of those grounds per year into the fuel," says George May. "Despite being delayed by the COVID-19, we plan to expand our operation into northwestern Europe within the next five years."
1. What do the first two paragraphs suggest?| A．It’s necessary to limit coffee consumption. |
| B．Drinking coffee is popular around the world. |
| C．Measures should be taken to recycle coffee waste. |
| D．Coffee grounds are the main cause of global warming. |
| A．A solid fuel. | B．A natural food. |
| C．A cup of hot coffee. | D．A tree trunk. |
| A．It is a high-tech company with a long history. |
| B．It is a promising recycler of coffee grounds. |
| C．It is started to produce coffee and fuels. |
| D．It's developing faster than Starbucks. |
| A．Give accurate measurement. | B．Cover a wide range. |
| C．Do mass production. | D．Classify different grades. |
5 . Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately：the air you breathe.
Previous studies have linked high exposure (暴露) to environmental pollution to an increased risk of heart problems，but two analyses now show that poor air quality can lead to heart attack or stroke (中风) within as little as a few hours after exposure. In one review of the research, scientists found that people exposed to high levels of pollutants (污染物) were up to 5% more likely to suffer a heart attack within days of exposure than those with lower exposure. A separate study of stroke patients showed that even air that the U. S. Environmental Protection Agency (EPA)considers to be of “moderate” (良好) quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure.
The authors of both studies stress that these risks are relatively small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure. However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices. So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.
1. The text mainly discusses the relationship between ________.| A．heart problems and air quality |
| B．heart problems and exercising |
| C．heart problems and smoking |
| D．heart problems and fatty food |
| A．relatively high | B．extremely low |
| C．relatively low | D．extremely high |
| A．Eating fatty food has immediate effects on your heart. |
| B．The EPA conducted many studies on air quality. |
| C．Moderate air quality is more harmful than smoking. |
| D．Stricter regulations on pollutants should be made. |
| A．inform | B．persuade |
| C．describe | D．entertain |
