Chinese scientists have developed a kind of plastic that degrades in sea water and could help slow down the
The new plastic can degrade in sea water over a period ranging from a few days to several hundred days,
For a long time, people focused
Scientists combined water dissolution and biodegradation processes
The research
China has given top attention to
The 1975 film Jaws was a great success,
17-year-old Jackson Hinkle, a surfer, has always been aware of
Litter is everywhere, doing great harm to the environment and life on our planet. Jeff Kirschner, who wants to build a litter-free world, started a global community named Litterati
The story began with his 6-year-old daughter. One day they were going on a hike
Jeff started to take action. He created Litterati, an app that makes it fun to pick up litter. The idea is
Litterati is more than an app,
5 . Tips for Green Travel With Kids
Travelling doesn’t mean letting go of all the eco-friendly choices we work so hard to achieve in our daily life. Here are a few tips for green travel with kids: Booking nonstop flights whenever possible will reduce carbon emissions (碳排放). If the closest local airport doesn’t have nonstop flights to a certain place, check with other local airports to see if nonstop flights are available.
Whether you’re flying or driving, it’s easy when travelling to pull into fast food restaurants for snacks.
| A．Walking is good for your health. |
| B．Try to cut back to save water and energy. |
| C．But you can pack healthy food from home. |
| D．Travelling is a great chance to introduce your kids to the world. |
| E．Reusable water bottles are easy to bring along wherever you travel. |
| F．Save energy by turning off the hotel room lights when you head out for the day. |
| G．You might have to drive a bit further, but saving on carbon emissions makes it worthwhile. |
1. Why does the woman invite the man to the beach?
| A．To collect some plastic. | B．To see a whale. | C．To relax. |
| A．The community. | B．The government. | C．A recycling company. |
| A．Responsible. | B．Lazy. | C．Emotional. |
7 . Weekly Round-up
①Tours that provide a window on wildlife without harming the animals are a welcome development for Chinese animal lovers, a recent survey found. About 60 percent of interviewees said that they would refuse to take part in tours that might badly influence the normal life of animals in the wild or be harmful to wildlife.
②The number of Chinese studying abroad grew at a slower rate（比率）in 2019, as more students have come to realize that studying abroad does not ensure a well-paid job in foreign countries. About 78 percent of Chinese students abroad plan to work in China either right after graduation or after working abroad for a while.
③A survey by American Councils for International Education，showed that there were 227,086 Chinese learners across the formal US education system, making Chinese the third most popular language being studied.
④Passengers found eating or drinking on the Beijing subway who do not stop when they are asked will face having their actions noted on their social credit（信用）score according to Beijing Municipal Commission of Transport.
1. What can you infer from News ①?| A．Chinese tourists will not do any harm to wildlife from now on. |
| B．The tours are specially designed for Chinese to protect wildlife. |
| C．Many tourists in China have a strong sense of animal protection. |
| D．The tours make more tourists become interested in wild animals. |
| A．Most Chinese students will no longer go abroad for education. |
| B．Most Chinese students studying abroad plan to work in China. |
| C．Chinese students studying abroad can find jobs easily in China. |
| D．Chinese students studying abroad can get well-paid jobs in China. |
| A．227,086 Chinese learners have been to America to study languages |
| B．Chinese has become the most popular language in the United States |
| C．passengers are not allowed to drink or eat on the Beijing subway |
| D．passengers will be punished and fined if they eat or drink on the subway |
Noah's Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of these animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M's College of Veterinary, Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2, 000 species of mammals, birds and reptiles will probably become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years. This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal. The entire procedure could take from three to five years to complete. "The nuclear transfer of one species to another is not easy, but the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it's difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort," adds Kraemer, who is one of the leaders of the Project at Texas A&M, the first-ever attempt at cloning a dog.
"They are trying to do something that's never been done, and this is very similar to our work in Noah's Ark. We're both trying to save animals that face extinction. I certainly appreciate their effort and there's a lot we can learn from what they are attempting to do. The cooperation between us is very much needed."
1. The final aim of "Noah's Ark" project is to ___________.
| A．make efforts to clone the endangered pandas |
| B．save endangered animals from dying out |
| C．collect DNA of endangered animals to study |
| D．transfer the nuclear of one animal to another |
| A．the long time lasting cloning research could be successful. |
| B．the eggs transfers immediately result in having a baby. |
| C．the lack of nuclear transfer could be a major problem to have new pandas. |
| D．if species should die out, basic building blocks would heal them. |
| A．China's Success in Pandas Cloning |
| B．Helping Ways to Avoid Extinction |
| C．Exploring the Possibility to Clone Pandas |
| D．The Practice in Noah's Ark |
| A．Kraemer and his team have succeeded in cloning a panda |
| B．scientists try to implant a panda's egg into a rabbit |
| C．Kraemer will work with Chinese scientists in clone researches |
| D．about two thousand species are to die out in a century |
9 . CLIMATE CHANGE REQUIRES THE WORLD’S ATTENTION
We have known about climate change for decades. There is little doubt that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate.
In 2013, a lot of people were shocked by a news photo of a dead polar bear that was found on Norway’s Arctic island of Svalbard. According to the scientists who found its dead body, all that remained of the polar bear was “skin and bones”. An expert who has studied polar bears for many years said that from the position of its dead body, the bear appeared to have starved and died. Experts claimed that low sea-ice levels caused by climate change meant the bear could not hunt seals as before, so it had to travel greater distances in order to find food. This alarming case showed how the increase in temperature had an impact on Earth’s ecology.
Then what is causing the increase in the global average surface temperature? Climate scientists often mention a key climate process called the “greenhouse effect”, which has two common meanings: the “natural” greenhouse effect and the “man-made” greenhouse effect. The “natural” greenhouse effect refers to the fact that heat from the sun enters the atmosphere and warms Earth’s surface as short-wave radiation. The heat is released back into space at longer wave lengths. Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Earth’s climate warm and habitable. Without this process, Earth could not sustain life. However, the “man-made” greenhouse effect has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earth’s surface temperature to rise quickly.
There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. Climate scientists have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a higher price to pay. In fact, news reports are frequently broadcast about extreme rainstorms and heatwaves causing deaths and economic losses.
Continued greenhouse gas emissions will result in further warming and long-lasting changes to the global climate. This requires the attention of people all over the world. Governments need to consider making policies and taking appropriate actions and measures to reduce greenhouse gas emissions. We as individuals can also reduce our “carbon footprint” by restricting the amount of carbon dioxide our lifestyles produce. It is our responsibility to seize every opportunity to educate everyone about global warming, along with its causes and impacts, because this is the most serious issue affecting all of us on this planet. So what will you do to help?
1. What type of writing is this passage?| A．Argumentative writing. | B．Narrative writing. |
| C．Expository writing. | D．Advertising writing. |
| A．Entertainment. | B．Economy. |
| C．Education. | D．Environment. |
10 . REDUCING WATER POLLUTION IN THE LI RIVER
The beautiful Li River and its amazing surrounding scenery is one of the most well-known tourist destinations in China’s Guangxi Zhuang Autonomous Region. It attracts millions of domestic and foreign visitors each year. However, its reputation as a top destination has had negative effects on the river’s water quality. This report looks at the problem of water pollution and some actions that have been taken to deal with it.
Previously, water quality in the Li River had suffered greatly from an increasing volumeof tourists, many of whom frequently threw garbage into the river. Many tour boats contributed to the problem too. Kitchens on board were using lots of oil, which was often thrown into the water. The growth in tourism also meant the local population rose rapidly, as well as the number of commercial and industrial enterprises. Water pollution levels increased, with more household and commercial waste ending up in the river. In order to feed more people, more chemicals were used to increase crop production. These chemicals led to severe water quality issues, causing a decrease in the number of fish species. Local officials were concerned that the pollution was damaging the natural environment and felt that urgent steps should be taken to restore the river’s original beauty.
A comprehensive initiative was started, with a number of measures that addressed the issues. The construction of waste water treatment facilities improved the water quality and water conservation. The collection and transport of household waste was also improved. Dozens of polluting enterprises were closed or moved. The local government set up strict regulations regarding further industrial development. New rules were also introduced regarding tour boat routes and garbage disposal methods. Furthermore, the local authorities began to use the media to spread environmental awareness and encourage greater use of clean energy. At the same time, they started to carry out inspections regularly and fine tourist organisations for abuses. With these measures, it is believed that the beauty of the Li River will be preserved for generations to come.
In addition, the ambitious “Water Ten Plan” is also now tackling water pollution across the country. Other initiatives, such as the “River Chief System”, hold senior officials responsible for reducing water pollution. With such campaigns in effect, China’s waterways are heading towards a clean and sustainable future.
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