1 . Tian Wangui and his wife Lu Min are villagers in Qiantian Village, Liaoning Province. They began planting trees over forty years ago. With their hard work, the two barren (贫瘠的) mountains are covered by trees now.
After leaving the army in the 1980s, Tian got back home and began planting fruit trees on the hills. In 1982, the couple got the contract rights (承包经营权) of two mountains. At first, they planted some young fruit trees on part of the land. In order to water them, they had to carry water up to the top of the mountains many times a day by themselves.
Now, the two mountains are covered by more than 50,000 trees of over 20 kinds. More than 2,000 birds live in the trees in the mountains.
“We cared for the mountains and trees as we cared for our children,” said Lu. “Even as we grow old, our children will protect the woods, watch over the birds and keep our dream alive.”
1. What did Tian Wangui do before he began planting trees?| A．He served in the army. |
| B．He watched over the birds. |
| C．He cared for the children. |
| D．He carried water up to the mountains. |
| A．Determined. | B．Friendly. | C．Curious. | D．Brave. |
| A．A couple got the contract rights by planting trees. |
| B．A couple taught their children to plant trees for over forty years. |
| C．A couple kept planting trees on the mountains for over forty years. |
| D．A couple helped the villagers plant trees on the mountains for over forty years. |
2 . Getting rid of(丢弃) old tyres(轮胎) has long been a problem. Every year many tyres are thrown. Some of the ways might be better than getting rid of them, but they are not especially green.
Energy recovery(回收利用) is one common way. This includes burning tyres to produce electricity, or as a way to provide heat for other industrial processes. But that produces planet-warming pollution. Tyres can be whole or broken in construction projects, such as repairing roads. There are, however, worries about chemicals from the tyres coming out and polluting the ground.
So some companies have begun exploring another pleasing idea. Since tyres are mostly made from hydrocarbons(碳氢化合物), it should be possible in principle to turn old tyres into environmentally friendly materials which can be used to run some cars they came from. One of the most thoughtful companies is based in Oslo, Norway. Later this year the company will start building a huge tyre-reused factory in Sunderland in northeastern England. In a couple of years, when the factory is fully operational, it will be able to turn 8 million old tyres into new products.
The process works by dividing a tyre into its three main parts. One is steel, which is used to support the structure of a tyre and which can be easily reused. The second is powder used to improve the continuous use of the tyre. The third is rubber. Some of that will be natural rubber from the rubber trees. The carbon black can be reused to make new tyres. That is of interest to tyre makers because it helps efforts to become carbon neutral(碳中和).
1. What is the disadvantage of energy recovery of tyres mentioned in the text?| A．It is unpractical. | B．It produces pollution. |
| C．It costs a lot. | D．It produces less electricity. |
| A．By giving an example. | B．By making questions. |
| C．By following time order. | D．By comparing differences. |
| A．Costly. | B．Useful. | C．Dangerous. | D．Short-lived. |
| A．Tyres can be divided into three parts |
| B．A company built a tyre-reused factory |
| C．Energy recovery can deal with old tyres |
| D．Old tyres can become environmentally friendly materials |
3 . The China International Search and Rescue Team (CISAR) was formed in 2001 and it is now made up of several hundred rescue workers (which is really awesome) and about 20 sniffer dogs. The team brings help and hope to those whose lives are
After long and careful training (训练), the team went on its first international rescue mission (任务) in 2003. That year, the Chinese team helped to save lives after earthquakes in Algerica (阿尔及利亚) and Iran (伊朗). It was the first time that a Chinese team had worked
Rescue workers are trained to find people, treat injuries, and hand out food, water, and other
Rescue workers must have big hearts, too. It takes a lot of
| A．improved | B．lost | C．affected | D．saved |
| A．wonder | B．view | C．disaster | D．language |
| A．outside | B．across | C．through | D．without |
| A．trips | B．experiments | C．surveys | D．missions |
| A．killed | B．damaged | C．injured | D．destroyed |
| A．took | B．struck | C．swept | D．changed |
| A．money | B．training | C．save | D．aid |
| A．ruins | B．demands | C．supplies | D．means |
| A．games | B．shelters | C．efforts | D．conditions |
| A．air | B．breath | C．tap | D．electricity |
| A．Rescue | B．Fire | C．Metal | D．Delivery |
| A．bury | B．save | C．aid | D．survive |
| A．strength | B．spirit | C．wisdom | D．love |
| A．risking | B．risks | C．to risk | D．risked |
| A．whenever | B．whoever | C．whatever | D．wherever |
Strange things were happening in Tangshan. For a few days, the water in the village wells rose and
At 3:42 a. m. everything began to shake. It seemed as if the world were coming to
But hope was not
Slowly, the city began to breathe and revive
5 . Now, Earth Day is celebrated around the world. We still face many challenges, such as climate change, plastic pollution, and deforestation. But we can all make a difference.
Her Trees Save LivesAdeline Tiffanie Suwana was 12 when her family’s home flooded. Indonesia, her island nation, is often hit hard by floods and other natural disasters.
Adeline learned that mangrove trees play a key role in flood protection and rallied classmates to plant 200 trees during a school break. They started a group called Sahabat Alam or Friends of Nature, which works to conserve the region’s biodiversity and combat climate change.
Today. Adeline attends university, studying how businesses can help the environment.
Teens’ Two-Fold InventionEPS—expanded polystyrene foam—is the white, lightweight stuff used to make things like takeout food containers, foam egg cartons, and packing “peanuts”. But it takes up a lot of space and is difficult to recycle. EPS breaks into small pieces as it floats down waterways into oceans, harming wildlife along the way.
Eighth-graders Julia Bray, Luke Clay, and Ashton Cofer looked at EPS’s chemical makeup and saw that it was mostly carbon. That sparked an idea. Could they turn it into activated carbon, a material that filters toxins from water?
After 50 hours of experiments, including one that accidentally set the family grill fire, they succeeded!
Solar for Her SchoolWhen Claire Vlases of Montana was in seventh grade, she learned about plans to expand and modernize her middle school. Claire asked the school board to add solar panels to the project. The board liked the idea but said it could contribute just $25,000, one-fifth of the cost. So Claire organized a group of kids and adults who set to work raising the rest.
They asked for donations, even going door-to-door for them. And they appealed to charitable foundations too. One even donated half the cost!
After two years of hard work, the group paid for the solar panels, which now supply one-fourth of the school’s electricity needs.
1. What do the three groups of teenagers have in common?| A．They are Earth-helping heroes. | B．They are from island countries. |
| C．They are high school students. | D．They are keen on experiments. |
| A．$25,000. | B．$50,000. | C．$62,500. | D．$125,000. |
| A．To give models for colorful school activities. |
| B．To explore the ways to deal with plastic pollution. |
| C．To inspire people to act for environmental problems. |
| D．To display the amazing power of effective cooperation. |
6 . The world’s forests may hold more secrets than previously thought: a new global estimate of tree biodiversity suggests that there are about 9,200 tree species remaining undocumented. Most are likely in the tropics, according to the new research.
The new research drew on the efforts of hundreds of contributors, who have categorized trees in two huge data sets: One, the Global Forest Biodiversity Initiative, records every species found in extensively documented forest plots worldwide. The other, TREECHANGE, puts together sightings of individual species. Together they suggest there are approximately 64,100 recorded tree species on the planet — up from previous estimates of around 60,000.
The researchers reached their estimate of an additional 9,200 yet undocumented species on the basis of the number of rare ones already in the databases. Most unknown species are likely to be defined as rare, found in limited numbers in small geographical areas, says the quantitative forest ecologist Jingjing Liang. The team’s result is “a rather conservative estimate,” Liang says, “because scientists know less about the preponderance of uncommon trees in places such as the Amazon, where out-of-the-way spots could host pockets of unusual species found nowhere else.” “If we can focus the resources on those rain forests in the Amazon,” Liang adds, “then we would be able to estimate it with higher confidence.”
Silman, a conservation biologist, who was not involved in the new study agrees that the study result is likely an underestimate. His and his colleagues’ local surveys suggest there are at least 3,000 and possibly more than 6,000 unknown tree species in the Amazon basin alone. Tree species often get grouped together based on appearance, he notes, so new genetic analysis techniques will likely lead to the discovery of even more biodiversity. Sliman wonders how many species will go extinct before scientists describe them. “How many are already known to native peoples in the Amazon — or were known to peoples or cultures who have themselves been made extinct through colonization, disease, or absorption? How many “species” already have dried samples sitting in a cabinet?” he says.
Searching for the new species will inform not only conservation but the basic evolutionary science of how and why species diversify and die out, Silman says. “Just the fact that there are thousands of species of something as common as trees out there that are still left to be discovered,” he adds, “I find pretty inspirational.”
1. What is the finding of the new research?| A．About nine thousand new tree species have been identified. |
| B．Thousands of tree species remain unknown to science. |
| C．Maintaining tree diversity has become a global challenge. |
| D．Human activities have led to the reduced number of trees. |
| A．The researchers adopted quality method to analyze data. |
| B．The researchers did extensive field study in out-of-the-way spots. |
| C．Inferring from the existing dada is the main research method. |
| D．Doing surveys and interviews is the main research method. |
| A．majority | B．evolution | C．cultivation | D．capability |
| A．genetic analysis technique failed to produce accurate information |
| B．trees of similar sizes in the Amazon basin are grouped together |
| C．too many rare trees were made into dried samples before being documented |
| D．the local peoples or the local cultures are not fully aware of the tree species. |
7 . Dry lightning(雷电)can still be harmful even when conditions aren’t so dry, said a study published in Geophysical Research Letters last month. Dry lightning during little to no rainfall was previously thought to cause wildfire danger only with less than 2.5mm of rain in a day. A Washington State University-led study of wildfires in the US West found dry lightning caused wildfires despite up to 7.7 mm of rain.
“The rainfall amounts we recorded should help provide a better understanding of just how much rain can cause a fire risk,” said Dmitri Kalashnikov, lead author of the study.
The researchers analyzed(分析)cases on more than 4,600 naturally caused fires from 2015 to 2020. They matched 3,726 of those to the lightning strikes that likely started them with the help of National Lightning Detection Network.
The study found that 15.3% of those were holdover fires which burn without smoke, bringing about over a hundred fires each year. Analyzing the rainfall amounts around the time of the lightning strikes showed greater rainfall than previously thought among the earlier found fires ranging from 1.7 mm to 4.6 mm.
While humans still cause most fires either by accident or on purpose, lightning-caused wildfires burn the most areas. Nearly 70% of the wildfire-burned land in the West was from lightning-caused fires according to the study. For example, the largest wildfire burn area in California history took place in August 2020 after dry lightning caused many wildfires at once.
Dry lightning can also start wildfires in places that are hard for firefighters to reach. This study found the places where holdover fires happened repeatedly were in the forested mountains of the Southwest as well as the middle and southern Rocky Mountains. Holdover fires cause the problem because they are so hard to notice.
1. The new study found dry lightning can still cause wildfires with a daily rainfall of __________.| A．7.7 mm | B．8.0mm | C．9.4mm | D．10.2mm |
| A．The finding of the research. | B．The number of the cases. |
| C．The process of the study. | D．The designers of the test. |
| A．They are difficult to notice. | B．The fire service is short-handed. |
| C．Campers often smoke there. | D．The locals fail to call firefighters. |
| A．A history textbook. | B．A science magazine. |
| C．A course plan. | D．A book review. |
8 . A Swedish company came up with a creative and cheap way to clean up its streets: to hire birds. Crows, especially, have been trained to collect cigarette butts (烟头) off roadways and put them in a machine that rewards the clever birds.
The pilot project called Corvid Cleaning comes from The Keep Sweden Tidy Foundation and aims to lower the cost of street cleaning in the city of Sodertalje.
Founder Christian Gunther-Hansen thought crows would be the best choice because they are very clever. “They are easier to teach and there is also a higher chance for them to learn from each other,” he told Swedish news agency TT. “At the same time, they have a lower risk of eating any rubbish by mistake”.
The birds are trained through a step-by-step process to pick up rubbish and place it into a machine that offers them food.
Tomas Thernstrom, a waste expert for the Sodertalje Municipality, said one of the most interesting things about the project was that crows could be taught to pick up cigarette butts but humans can’t learn not to throw them on the ground in the first place.
1. Why did the Swedish company prefer to choose crows instead of other birds to collect cigarette butts?| A．Because crows are clever. |
| B．Because crows like eating cigarette butts. |
| C．Because there are plenty of crows in Sweden. |
| D．Because people there are interested in crows. |
| A．punishes | B．discovers | C．searches | D．awards |
| A．To train crows to collect cigarette butts. |
| B．To set up the Keep Sweden Tidy Foundation. |
| C．To lower the costs of street cleaning. |
| D．To make the Keep Sweden Tidy Foundation famous. |
| A．It’s difficult to train crows to pick up rubbish on the ground. |
| B．It’s difficult to stop people from throwing away rubbish everywhere. |
| C．It’s interesting to train crows to pick up rubbish on the ground. |
| D．People who throw away rubbish everywhere are not as clever as crows. |
On February 16, 1861, a big earthquake struck Sumatra, an Indonesian island. The earthquake shook the western side of the island,
Recently, though, a team of scientists discovered that another earthquake occurred before this deadly event. According to the record, that earthquake
But silent earthquakes like the one in Sumatra change the game for scientists. These silent earthquakes happen all over
10 . Afroz Shah, a lawyer in Mumbai, hasn’t had a weekend off in four years. But he hasn’t spent this time preparing for
His mission? Saving the world’s oceans from
It’s a calling he found in 2015 after moving to a community in Mumbai called Versova Beach. He had played there as a child and was
“The whole beach was like a
In October 2015, Shah began
For Shah, the work has always been a
He’s now spent 209 weekends on this mission,
“This world talks too much. I think we must talk
| A．teaching | B．court | C．housework | D．cleaning |
| A．river | B．soil | C．plastic | D．oil |
| A．upset | B．excited | C．delighted | D．hesitant |
| A．grown | B．changed | C．reserved | D．protected |
| A．pure | B．golden | C．shiny | D．visible |
| A．carpet | B．curtain | C．painting | D．photograph |
| A．temporary | B．permanent | C．ugly | D．pretty |
| A．sticks to | B．keeps off | C．gives back | D．ends up |
| A．killer | B．cleaner | C．guest | D．decoration |
| A．sweeping | B．attacking | C．visiting | D．beautifying |
| A．pulling | B．thinking | C．picking | D．looking |
| A．came | B．failed | C．went | D．spread |
| A．involved | B．lived | C．stuck | D．paid |
| A．easy | B．tough | C．personal | D．general |
| A．known | B．regarded | C．decided | D．honored |
| A．cause | B．case | C．position | D．fame |
| A．requiring | B．rejecting | C．inviting | D．inspiring |
| A．originally | B．finally | C．politically | D．theoretically |
| A．fewer | B．less | C．better | D．worse |
| A．honor | B．beauty | C．hope | D．love |
