1 . When you swim on the beach and sea, have you ever accidentally drunk the seawater? How did it feel? It must have tasted salty. So, why is the seawater salty?
Seawater is water that comes from the ocean. Seawater can be salty because it contains an average salt content of 3.5%. This is also a place for the salt farmers to produce cooking salt and other salt.
Some theories explain that seawater comes from rainwater that falls and flows through rivers and estuaries (河口) where the seawater will be fully filled and again formed clouds because the steam uses the help of the sun. When we talk about this, we talk about the rainwater cycle. But when the rainwater cycle occurs, the water that passes through the river carries mineral salts. These mineral salts are obtained from various places of the land starting from rocks and soils that the rainwater flows through, these remaining mineral salts make seawater salty, so the salinity of seawater is different in each part of the world. But it is certain that seawater is salty or has high salinity.
The saltiest sea in the world is the Red Sea. There the temperature is extremely hot so that evaporation (蒸发) is greatly carried out. High evaporation, coupled with little rainfall and little input of water from the river, causes its highest level of salinity. There is also the Dead Sea, which is nine times saltier. Due to the high salinity, when you swim there, you can float. However, the Dead Sea is not a sea at all which is a lake geographically.
1. What’s the purpose of paragraph 1?| A．To draw a conclusion. |
| B．To make the article interesting. |
| C．To introduce a famous beach. |
| D．To bring in the topic. |
| A．Land. | B．Ocean. | C．Rain. | D．Cloud. |
| A．Its salinity is higher than that of the Dead Sea. |
| B．The climate there causes the highest salt level. |
| C．People are in danger when they swim there. |
| D．The land around it contains the most salt. |
| A．The reason why the seawater tastes salty |
| B．The reason why the Dead Sea is not a sea |
| C．The reason why the rainwater cycle occurs |
| D．The reason why the sea looks blue and green |
Canada, which
Apart from its geographical diversity, Canada’s many rural areas and urban centers reflect the diversity of its residents. Some of Canada’s
This ethnic variety, in turn, brings
The Jiaohe Ancient City Ruins,
Guri Bakri, a 39-year-old conservator of the Jiaohe Ruins, starts her daily inspection at the site as usual, ensuring the safety of tourists and
After graduating in 2013, Guri returned to her hometown and became one of her father’s
In recent years, the state cultural protection department has invested more than 100 million yuan ($ 14.8m) in the
内容要点提示：天气宜人；旅游资源丰富；（多元）文化气息浓厚。
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According to an online survey,
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5 . Depths of our Earth hold great wonders. Below we explore four deepest places on Earth.
Veryovkina Cave, Georgia
Its entrance is located 2,285 meters above sea level. In 2018, scientists reached its bottom at 2,212 meters down. They squeezed through tiny openings to get from one cave to another. Rockfalls and floods waited secretly at every turn. Scientists could develop new medicines from microorganisms found in cave samples. Caves also record ancient life and past climates.
The Mariana Trench, the Pacific Ocean
The Mariana Trench, with the maximum depth of 11,034 meters, is the deepest part of Earth’s surface. Pressure there is intolerable, but creatures like sea cucumbers (海参) still exist. Scientists exploring it can gain deeper insights into how plates move and why earthquakes and volcanoes occur.
The Dead Sea, the Middle East
The Dead Sea is the lowest point on land at about 1,400 feet (about 400 meters) below sea level. It’s nearly ten times saltier than ocean water, so you literally can’t sink in the Dead Sea! Scientists think it could go dry in a few decades. Despite its name, the Dead Sea holds life. A few kinds of algae (藻类) and bacteria love its salty water.
Lake Baikal, Russia
At the depth of 1,642 meters, Lake Baikal is the deepest inland body of water. The Baikal seal is the only known seal that lives in this world’s deepest freshwater lake. Scientists study the lake not only for the solid stuff beneath it that records climate history but because it’s in a zone where a plate is splitting apart, causing earthquakes.
1. What do we know about Veryovkina Cave?| A．It was discovered in 2018. | B．Its pressure is far from bearable. |
| C．It is risky to explore. | D．Its samples are of little practical value. |
| A．Georgia & Russia. | B．Russia & the Pacific Ocean. |
| C．Georgia & the Pacific Ocean. | D．The Middle East & Russia. |
| A．They have some sign of life. | B．They are over a thousand meters deep. |
| C．They are results of climate change. | D．They are all below sea level. |
6 . The country’s first national park, Yellowstone, is renaming one of its largest mountains to honor indigenous people after research revealed the man it had been named after helped lead a massacre (屠杀) against local tribes. As part of the park’s 150th anniversary, officials announced the 10,551-foot high peak formerly called Mount Doane is now First Peoples Mountain.
“It is a victory, yes. Is history being rewritten and retold truthfully? I hope so,” William Snell, executive director of the Rocky Mountain Tribal Leaders Council, told NPR. His group helped advise federal officials on the name change. In an email, Snell said the change to First Peoples Mountain couldn't have come at a better time as Yellowstone officials prepare for the park’s anniversary in August.
The peak—along a range on the eastern side of Yellowstone Lake—had been named after Gustavus Doane, who helped lead the Washburn-Langford-Doane exploration in 1870 that eventually led to the park getting federal protection.
But recently, historians uncovered Doane’s role in an attack that left at least 173 Native Americans dead. Known as the Marias Massacre, Doane carried out the attack over the killing of a white fur trader. In writings, Doane cast a favorable light on the attack and even showed off about it for the rest of his life, the National Park Service said last week.
The renaming to First Peoples Mountain is part of a trend to better recognize the roles and contributions of Native Americans. It has also become a priority of the nation’s first indigenous cabinet secretary—the Interior Department’s Deb Haaland, who oversees the National Park Service—and Charles SamsⅢ, the first Native American to serve as that agency’s director.
Across the American West, many iconic representative mountains and other environmental places were named after early white settlers, mostly men and some with terrible pasts.
In Yellowstone, park officials say they may consider further changes to derogatory (贬损的) or inappropriate geographical names in the months ahead.
1. Why does Yellowstone decide to rename one of its largest mountains?| A．To gain more profits. | B．To uncover the history of 1870s. |
| C．To be in honour of Native Americans. | D．To change people's attitude towards the park. |
| A．The terrible pasts of Doane. | B．The effort historians made. |
| C．The contributions Doane made. | D．The conclusion National Park Service drew. |
| A．Improve the service qualities. | B．Learn from history events and characters. |
| C．Protect the environment of Yellowstone Park. | D．Consider renaming improper geographical names. |
| A．Doane regarded his deeds as a shame. | B．Doane was once mistaken for a hero. |
| C．Americans reacted to the renaming negatively. | D．The government thought little of the renaming work. |
The beautiful Li River is one of the
Water quality in the Li River had suffered
Finally, a series of urgent steps were taken
8 . For thousands of years, Chinese writers have travelled all over the country to take down notes about the geographical conditions of each city. Among them, well-known Chinese geographer and writer Li Daoyuan, in the Northern Wei Dynasty (386-534), composed his book, Commentary on the Water Classics, after studying the original literary version, Water Classics. He later expanded the river records to 1, 252 from the original 137.
The book is now being studied again by Professor Li Xiaojie and his team from Fudan University. They have been using drawing software and 3D modelling to recreate the waterway situations on a map based on the book description. So far, they have completed research on four rivers.
“Ancient people knew really well how to apply the power of nature to technical considerations,”Li said, giving the example of Qianjin’e, one of the most famous ancient water conservation projects in Luoyang, Henan. In order to lead the river into the city for irrigation (灌溉) in ancient Luoyang, the officials built a canal branch by separating a northwest-southeast river. However, the canal water wasn't enough to support the citizens in dry seasons. To solve that, on the northern side of the canal branch, the officials built a reservoir (水库) and a channel to lead the water to the canal branch, where the waterways would converge and flow together to the city.
In Commentary on the Water Classics, a total of 2, 800 cities are recorded with details. Still, the process of recreation takes much effort. After doing a lot of text analysis and fieldwork, the team has gradually created the model with 3D modelling software based on repeated deductions (推论).
For Professor Li, the book is not only a record of the natural landscape over 1, 000 years ago, but also a detailed description of humanity and culture and a treasure for today’s reference.
1. What can we learn about the book Commentary on the Water Classics?| A．It has been out of date. | B．It explains 3D modelling. |
| C．It keeps records of 137 rivers. | D．It is based on previous studies. |
| A．Join. | B．Pass. | C．Cross. | D．Begin. |
| A．Its major problems. | B．Its detailed analysis. |
| C．Its complex process. | D．Its successful application. |
| A．3D Technology Fuels Modern Research |
| B．Ancient Classics Inspire Modern Research |
| C．An Effective Approach to Model Recreation |
| D．A Famous Writer of Chinese Ancient Classics |
9 . I am not a morning person, but as I stand on the boulder (巨大的砾石) in the early dawn, my mind is sharp and alert. I am more than awake, concentrating on the vast endlessness below.
There is a noticeable lack of early birdsong here; no hiss of offshore wind fanning the waves. The only sound is my breath, heavy after the scramble to the top. It is by no means a difficult climb, but I had to hurry to beat the sun.
“If you stand at the top of Kubu Island just before sunrise,” said one of the returning visitors, “You can see the arc (弧线) of the Earth.”
He was right.
From up here the horizon cuts not so much a line as an arc.
Soon my feeling of being in the moment is replaced with something as strange and ancient as this place itself. My breathing calms and becomes shallow. My heartbeat slows. I am first surrounded by in silence. I am a tiny, shrinking spot. Then I disappear completely.
They say that astronauts looking down on Earth gain a sense of perspective that changes them forever. They begin to understand how much we are a part of our planet, and how much it is a part of us. The astronauts are 400 kilometres off the surface of Earth, and while the top of Kubu Island is only 10 metres high, there is something about this pile of boulders that sends you into orbit.
Kubu Island isn’t actually an island, but rather, an outcrop of ancient rocks that are up to two billions year old. It was once rested on the edge of a vast lake. As the water evaporated, it created the huge Makgadikgadi Pan (马卡迪卡迪盐沼盆地), one of the world’s largest salt pans.
Ancient tribes and civilizations have migrated and lived here, first to fish from its rocks and then to commune with nature and its spirits. Today, adventurers and tourists come here to marvel at this strange pile of boulders with baobab trees (猴面包树) growing out of it. These trees are estimated to be 3,000 or 4,000 years old; they are really impressive not only for their size but also because they seem to have so much to tell about the history of this island.
This is the gift that Kubu Island gives and the power that it has. This tiny, weird outcrop — if not in the middle of nowhere, then certainly on the edge of it — can give you a sense of yourself that very few places can. A sense of yourself as a person on this planet and, somehow, way beyond it.
1. Which of the following can best describe Kubu Island?| A．It is a “small” island, surrounded by waves and water. |
| B．It is an “ancient” island, featuring recreational activities. |
| C．It is a “dry” island, surrounded by a sea of salt. |
| D．It is a “remote” island, resting on the edge of a vast lake. |
| A．feel anxious for | B．pose danger to |
| C．be grateful to | D．be amazed at |
| A．recommend a unique travel route to a peaceful and silent island |
| B．encourage readers to reflect more on themselves while travelling |
| C．inform readers of a mysterious place that deserves to be explored |
| D．advise readers to visit an island which is peculiar in its original state |
