Placed among the busy streets of Washington, D. C. is a large public garden that many Americans have never heard of. The U. S. National Arboretum (植物园) includes     1     collection of flowering plants called azaleas, a field of native plants named ferns, and flowering trees in the dogwood tree area. The garden     2     (establish) by Congress in 1927. It plays a leading part in researching and developing plants like trees, shrubs, flowers, and grasses.

Government scientists are in charge of the 180-hectare area. Their main goal is     3    (strengthen) the U. S. economy by making sure an important kind of agriculture,     4     (call) the nursery industry, continues to perform well. The most recent numbers from the U. S. Department of Agriculture (USDA) show that the ornamental and landscape plant industry creates billions of founds in sales each year.

The arboretum is home to one of the     5     (large) collections of preserved seeds in the world. The National Arboretum Herbarium (植物标本)     6     (house) around 700,000 ex-ample seeds. They include seeds from plants that the USDA considers as     7    (economical) important. Scientists collect many genetically different seeds within a kind of plant from both native and non-native plants. The reason     8     collecting that data is that scientists protect plants from harmful situations like climate change, changed environments, or other new and possible risks.

While the scientists do their work, the public     9     (explore) plants is free to visit the arboretum. Though many people may not know it, the arboretum has had a hand in developing a number of plants     10     are part of American landscaping.

In the past 10 years, China has added more than 22 million hectares of forest. Thanks to     1     (generation) of tree planters, our surroundings are becoming much greener.

In 2022, China completed the afforestation (植树造林) of 3.83 million hectares and treated 1, 847, 300 hectares of rock-deserted land. After continuous effort, China has achieved     2     (remark)progress.

China’s forest coverage rate has reached 24 percent, and forest accumulation has reached 19 billion cubic meters,     3     has laid a solid foundation for maintaining national ecological security and     4    (improve)people’s well-being.

In terms of vegetation (植被) restoration, in 2020 China published a guideline to perform a forest chief scheme nationwide. Principal leaders of governments should     5     (appoint)as “forest chiefs” at various levels ranging from the provincial level     6     the village level.

Bazhou District in China’s Sichuan Province is     7     unique biodiversity ecological zone. In the past, the surface of the mountain there was exposed due to mining;     8    , after the government’s management, the area has returned to its former green self.

In terms of ecological civilization education, in Shanghai, for example, an elementary school has     9     (creative)combined traditional Chinese medicine resources with AR technology to help children to learn plants. Meanwhile, Suzhou in Jiangsu Province has digitized tree planting activities through a mini-game on how     10    (identify)different types of trees.

Wetlands are the link between the land and the water. They are transition zones where the flow of water, the cycling of nutrients and the energy of the sun meet to produce     1     unique and special ecosystem     2     (characterize) by hydrology, soils and vegetation—making these areas very important features of a watershed. The water is often groundwater,     3     (spill) up from an aquifer or spring. A wetland’s water can also come from a nearby river or lake. Seawater can also create wetlands, especially in coastal areas that experience strong tides. Here is one in China.

The National Nature Reserve of Guangdong Nanpeng Islands in Guangdong Province was established in 2003. It     4     (cover) a total area of 35,679 hectares. It became the fifth national-level marine nature reserve in Guangdong, as well as the first one in the eastern region of Guangdong, in 2012. In 2015, it     5     (recognize) and included in the International Important Wetlands Directory.

The main focus of the reserve is to protect the unique underwater natural landscapes, the ecosystems of the nearby     6     (coast) waters, the rare and endangered marine animals, the various fish species and their habitats, as well as the marine biodiversity.

Researchers have discovered 1,308 marine species in the area, including 772     7     (economic) significant fish, shrimp, crab, mollusk, and algae species. The reserve is home     8     more than 21 identified rare and endangered wildlife species in water, among     9     nine species such as the Chinese white dolphin and the nautilus are classified as first-class protected animals at the national level, while     10     (variety) of other 27 species, such as the common bottlenose dolphin is classified as second-class protected animals.

Known for its beautiful scenery, Mount Wuyi is the only place in the country     1     is home to Wuyi rock tea.

With tea farming dating back over 1,000 years, the mountain’s tea industry has a rich history. The area     2     (provide) tea for people at home and abroad since the first century CE, and in the     3     (eighteen) century, Wuyi rock tea was the most popular tea in Europe. However, its     4     (popular) was gained at the cost of the local environment. Illegal land reclamation (开垦) of tea mountains and the destruction (破坏) of plant resources have occurred frequently,     5     (damage) the environment in the area around Mount Wuyi.

The need to strike a balance between farmers’ livelihoods and the local environment has appeared as     6     unique challenge for the Wuyishan National Park, which covers 1,280 square kilometers as it straddles (横跨) the eastern provinces of Fujian and Jiangxi.     7     (found) in 2021, it was among the first batch of China’s national parks.

The park has a tea farming area of 34.54 square kilometers, accounting     8     2.7 percent of its total expanse. The     9     (authority) have cooperated with tea experts to develop measures for the protection and improvement of the Mount Wuyi tea industry and biodiversity, ensuring the sector’s sustainability for generations     10     (come).

July 2023 was the world’s warmest month on record, with heat waves spreading across North America, Asia and Europe. How to cool the planet     1    (trouble) scientists in the last decades. They are now turning     2     sun-blocking technology, which refers to reflecting sunlight back into space to keep down the temperature of the     3    (planet) climate.

According to Euro news, a European television news network, one idea     4    (involve) pumping sun-blocking particles (粒子) into the upper atmosphere. The particles will then stay in the air and redirect sunshine back upwards. It is like     5    (apply) sunscreen on the outside of Earth. Another very     6    (promise) technique is called “cloud brightening”. This method includes sending sea salt particles into clouds above the sea, making     7    (they) whiter and thus reflect more sunlight back into space.

However, following the report,     8     open letter by more than 60 scientists called for caution and more research first. Kristen Rasmussen, a climate scientist at Colorado State University, US, has been studying     9     these sun-blocking methods will affect rainfall patterns. She said that apart from rainfall, ecosystems and even human     10    (community) will also be affected. “We need to be very cautious on this,” Rasmussen told Scientific American.

More than 11,000 scientists from 153 countries have sounded the alarm on climate change. In a paper     1     (publish) last week in the journal BioScience, they signed a declaration (声明) stating clearly that planet Earth is facing a climate emergency, saying that if no changes     2     (make), the world will face untold suffering. The evidence that the scientists collected reveals an undeniable truth    3     human activities have been causing global warming from the fast rise of fossil fuel consumption    4     the increase in greenhouse gas emissions (排放) over the past 40 years.

The scientists also gave some instructions to fight against global warming,     5     (propose) six actions to prevent further disasters: stabilizing population     6    (grow) by investing into family-planning services and girls’ education, replacing fossil fuels, cutting the emissions of climate pollutants, eating less meat, restoring and protecting ecosystems, and building     7    carbon-free economy.

The scientists say the climate crisis is     8     (close) related to human activities, so they call on people     9     (change) their life styles. But these measures are comparatively abstract.    10    , it is high time for policymakers to figure out more practical measures that can bring down carbon emissions.

I was recently fortunate enough to have the opportunity to travel to Suzhou in Jiangsu Province. As    1    amateur student of history, I have always been fascinated with this incredible city and had    2    (particular) high expectations.

Upon landing and heading to my hotel, I began to wonder what the scenery around my hotel would be like. The following few days    3    (find) me floating down the ancient canals in the “Old Town” district of Suzhou, visiting its gorgeous and historic gardens,    4    (explore) the many markets of the city and taking advantage of every opportunity I could to eat favorable Suzhou cuisine. I found myself    5    (overwhelm) by the infectious energy that surges (涌动) through the city.

This “energy of Suzhou” is represented best by its people. Suzhou people have enormous respect for    6    (they) city’s history, while also having an innovative eye on the future. Suzhou served    7    a key trading hub for much of China’s history, drawing in scholars, engineers    8    merchants from all over the country for thousands of years.

The entirety of Suzhou    9    (be) a true treasure of China that manages the difficult balance of innovation and preservation. I eagerly await what extraordinary    10    (accomplish) it will surely achieve next.

Each city has its own unique cultural symbol,    1    (break) the similarity of cities. The    2    (significance) cultural symbols such as Beijing’s Forbidden City, Hangzhou’s West Lake and suzhou’s gardens have helped form strong cultural confidence.

Qinhuangdao is focusing on fashion tourism. A first-class international tourist city needs wold tourist attractions, and Qinhuangdao seems    3     ( have ) some ,The Great Wall is world-class, and so    4     (be) the Beidaihe wetlands.

Qinhuangdao has successfully transferred the world’s unique cultural symbol，The Classic ofMountains and Seas，into the city’s cultural    5    ( develop). Qinhuangdao is the only city in China    6    (name) after an emperor’s imperial name.The West Port of Qinhuangdao is near the legendary place where Qin Shi Huang    7    ( seek ) immortality(永生) into the sea. At the West Port cruise terminal, the 350-meter-long giant murall The Illustrations of Mountains and Seas reaches far away by the waves of the Bohai Sea. It is presenting the ancient wonder of the book which is rich    8    myths and legends to foreign visitors and sending Eastern culture and philosophical thoughts to a wider stage.

A distinctive and unique city cultural symbol can improve recognition and identity,    9     will help to enhance the city’s attractiveness. With a cultural symbol, there is cultural confidence,and it is    10    deepest power a city has.

The World Health Organization (WHO) has announced a shocking finding about the air we breathe. It has found that almost everyone on Earth breathes unhealthy air. The WHO made     1    (it) air quality update ahead of World Health Day on April 7. The update reported that 99 per cent of the world’s population breathes air     2     goes beyond WHO air quality limits. It looked at data from over 6,000 cities in 117 countries. People     3    (live) in lower- and middle-income countries breathe the poorest-quality air. Millions of people die in these countries because of pollution-related diseases. The WHO said: “After surviving a pandemic, it is unacceptable to still have 7 million preventable deaths due     4     air pollution.”

The WHO said its report highlighted the need to move away from fossil fuels. It asked governments to do more     5     (reduce) levels of air pollution. It said: “Current energy concerns highlight the importance of speeding up the transition to cleaner and     6    (healthy) energy systems.” It added that high gas prices, energy     7    (secure), the dangers of air pollution, and climate change mean the world must be less dependent on fossil fuels. The WHO report     8    (include) many recommendations for change. One of these is     9     use of clean energy for cooking, heating and lighting. Another is to “build safe and affordable public transport systems and pedestrian- and cycle-friendly     10    (network)”.

The Ming City Wall Ruins Park, one of the best parks in Beijing,     1     (locate) in the central area of Beijing from Chongwenmen East Street to Dongbianmen.     2     (cover) a total area of about 15.5 hectares, the park     3     (consist) of 3.3 hectares of city wall ruins and the southeast corner tower, and 12.2 hectares of green space.

The Ming Dynasty City Wall from Dongbianmen to Chongwenmen is one of the only two remaining Ming Dynasty City Walls in Beijing.     4     (historic), the Ming Dynasty City Wall is 25 kilometers long and was first built in the 17th year of the Yongle Period of the Ming Dynasty (1419 AD), and has     5     history of over 580 years. The remaining relic,     6     is about 1.5 kilometers long, used to be part of the inner city wall of Beijing. It is the     7     (long) section of the city wall remains in the city, and an important symbol of Beijing.

Using a simple design, the park highlights the beauty of the     8     (ruin) city walls. The “Old Trees and Ming Walls”, “New Charm of Ancient Buildings” and other sceneries in the park have a long history and rich connotation (含义), showing the profound     9     (culture) accumulation of Chongwenmen, which adds endless imagination     10     people’s mind.