Inner Mongolia Autonomous Region is an important ecological screen for the north of China and even the whole country. Building a green great wall to ensure China’s ecological security is one of the most important things of autonomous region.
The largest ecological function zone in the north of China, Inner Mongolia has a variety of landscapes, including forests, grasslands, wetlands, rivers and lakes. In recent years, the region’s environment has improved, with its forest and grassland area having increased and desert reduced.
However, it still faces a number of challenges in ecological preservation. For instance, the region faces severe water shortages with the number of lakes dropping from 427 in 1987 to 145 in 2010. In addition to a lack of rainfall, huge water consumption in agricultural and industrial production has worsened the water shortage. Too much use of fertilizers has damaged the soil and affected the growth of grass, accelerating the expansion of the desert, which results from a lack of water.
The local government encourages planting trees on grassland as they can get more pay for trees than by growing grass. However, the trees they plant often have a low survival rate as they have a high water consumption rate. Also, to treat wetlands, some areas have planted a large number of a single tree species. This practice may damage biodiversity (生物多样性) and endanger the survival of certain animals.
Experts suggest taking the region’s water resources and weather conditions into consideration in future ecological projects.
1.What do we know about the green great wall in Inner Mongolia Autonomous Region?
A. It adds the beautiful scenery to this area.
B. It acts as a guard to protect the north of China.
C. It works well in saving the endangered animals.
D. It contributes to the decrease of the grassland.
2.What does the third paragraph mainly talk about?
A. The causes of water shortages. B. The protection of ecological environment.
C. The solutions to water shortages. D. The importance of ecological environment.
3.What does the underlined word “accelerating” in Paragraph 4 probably mean?
A. weakening B. shortening
C. lessening D. quickening
4.What’s the author’s purpose of writing the text?
A. To tell the function of the green great wall.
B. To introduce the green great wall to the readers.
C. To provide guidance on traveling around Inner Mongolia.
D. To offer some advice on building the green great wall.
高二英语阅读理解中等难度题
Inner Mongolia Autonomous Region is an important ecological screen for the north of China and even the whole country. Building a green great wall to ensure China’s ecological security is one of the most important things of autonomous region.
The largest ecological function zone in the north of China, Inner Mongolia has a variety of landscapes, including forests, grasslands, wetlands, rivers and lakes. In recent years, the region’s environment has improved, with its forest and grassland area having increased and desert reduced.
However, it still faces a number of challenges in ecological preservation. For instance, the region faces severe water shortages with the number of lakes dropping from 427 in 1987 to 145 in 2010. In addition to a lack of rainfall, huge water consumption in agricultural and industrial production has worsened the water shortage. Too much use of fertilizers has damaged the soil and affected the growth of grass, accelerating the expansion of the desert, which results from a lack of water.
The local government encourages planting trees on grassland as they can get more pay for trees than by growing grass. However, the trees they plant often have a low survival rate as they have a high water consumption rate. Also, to treat wetlands, some areas have planted a large number of a single tree species. This practice may damage biodiversity (生物多样性) and endanger the survival of certain animals.
Experts suggest taking the region’s water resources and weather conditions into consideration in future ecological projects.
1.What do we know about the green great wall in Inner Mongolia Autonomous Region?
A. It adds the beautiful scenery to this area.
B. It acts as a guard to protect the north of China.
C. It works well in saving the endangered animals.
D. It contributes to the decrease of the grassland.
2.What does the third paragraph mainly talk about?
A. The causes of water shortages. B. The protection of ecological environment.
C. The solutions to water shortages. D. The importance of ecological environment.
3.What does the underlined word “accelerating” in Paragraph 4 probably mean?
A. weakening B. shortening
C. lessening D. quickening
4.What’s the author’s purpose of writing the text?
A. To tell the function of the green great wall.
B. To introduce the green great wall to the readers.
C. To provide guidance on traveling around Inner Mongolia.
D. To offer some advice on building the green great wall.
高二英语阅读理解中等难度题查看答案及解析
Sandstorms hit northwestern China's Gansu Province and North China's Inner Mongolia Autonomous Region on the first day this year. According to Sun Landong， a meteorologist with the Lanzhou Meteorology Observatory，visibility was less than 100 meters in Minqin， a Gansu county near Inner Mongolia， because of sand. When visibility drops to less than 1 kilometer，it is called a sandstorm. The sandstorm in Minqin blew up dust in neighboring towns， such as Baiyin， Wuwei， Jinchang and Lanzhou， the capital city of Gansu Province. Dust-laden winds also swept into Beijing. Brought by northwesterly blowing at more than 20 meters per second，dust first reached the capital's suburbs at 7 a. m，downtown areas at 9 a. m. The winds，which died down during the night，brought the temperature down to as low as 80C below zero and many flights put off their planned time from the city's airport.
It is quite rare for sandstorms，which are frequent between March and June，to happen in winter，when the earth is frozen. The sandstorms in Gansu and Inner Mongolia do not necessarily mean there will be more of them in the spring than last year，when they were serious，but Beijing is taking it very seriously. It is reported that Beijing will spend 6 billion yuan ( US 725 million) in preventing sandstorms in the capital and has already set up a special team to make sure what causes them.
1. What is the main idea of the passage?
A. Sandstorms took place in Gansu.
B. Sandstorms happened on the first day of the new year.
C. Sandstorms are very serious，compared to last year.
D. Experts are trying their best to determine the cause of the sandstorm formed this year.
2.Suppose the dust was 300 kilometers away from Beijing， it would reach Beijing about
hours later if it travels at a speed of 20 meters per second?
A. 4. 2 B. 1. 5 C. 2. 0 D. 2. 5
3.Why did sandstorms begin in the winter this year?
A. Because there was little snow this season.
B. Because a lot of trees have been cut down.
C. Because people took few measures to control them.
D. It is not mentioned in the passage.
4. Which of the following doesn't belong to the bad effect the sandstorms have done in Beijing?
A. The temperature fell. B. Flights put off their time to take off.
C. The air is dirty. D. People had three days off.
5.The author wrote the passage to .
A. tell us the environments are becoming worse and worse
B. explain what measures people have taken to control sandstorms
C. make people realize the need to protect the environment.
D. call on us to do what we can to save the earth
高二英语阅读理解中等难度题查看答案及解析
Jiuzhaigou is a very beautiful place. It is in the Aba Tibetan and Qiang Autonomous Region in Sichuan Province. Jiuzhaigou is a valley. It is more than 40 kilometers long. The green and golden trees, the lofty and multi-shaped mountains and the clear and colorful waters form the unique beauty of Jiuzhaogou. The water of Jiuzhaigou is the soul of the beauty. There are more than 100 lakes of different shapes in the valley. These lakes have wonderful colors. They are called “haizi”, which means son of the sea. It is these beautiful lakes that make Jiuzhaigou a fantastic place. Between the forests and the lakes, there are nine Tibetan villages. The name Jiuzhaigou means Nine Village Valley.
Jiuzhaigou was discovered because of a panda rescue program. The pandas were once endangered because the bamboo there was blooming. When people came to rescue the pandas, they were surprised by the beauty of Jiuzhaigou. After that, Jiuzhaigou became a protected scenic area.
In China, there is a saying which goes like this: No mountain is worth seeing after you have seen Mount Huang and no other body of water will attract you after you have visited Jiuzhaigou. The beauty of Jiuzhaigou cannot be described with mere words. The best way to enjoy this fairyland is to go there. See you in Jiuzhaigou.
1. What is the best title for the passage? （no more than 3 words）
_____________________________________________________________
2. How long is the Jiuzhaigou Valley? （no more than 7 words）
_____________________________________________________________
3. How was the Jiuzhaigou Valley discovered? （no more than 9 words）
4. What does the name Jiuzhaigou mean? （no more than 7 words）
_____________________________________________________________
高二英语其他题中等难度题查看答案及解析
It is reported that a record-breaking high-speed rail will connect Inner Mongolia in the north to Hainan in the south. According to the Shaanxi Development and Reform Commission，the proposed line will operate at a speed of 350 kilometers per hour（217 mph）．
Beginning in Inner Mongolia's Baotou city and running through southern Shaanxi， Hubei， Hunan， Guangxi and Guangdong， its final stop would be in Haikou city on Hainan Island，China's southernmost province．
Though the exact length of the proposed route has not been released，it will likely become the world's longest high-speed rail line as the journey by road between Baotou and Haikou is approximately 3，000 kilometers（1，864 miles） long． Currently， the world's longest high-speed rail line is almost 2，300 kilometers long （1，429 miles）， running from Beijing to Guangzhou．
The proposed rail is part of China's aim to create another "Silk Road of the 21st Century" and improve the country's transportation network while driving land development and urbanization（城市化） in some provincial areas．
Many of the provinces through which the high-speed trains will travel are near major bodies of water，such as the Yellow River in Inner Mongolia and Shaanxi province，the Yangtzi River in Hubei and the South China Sea， where the line would end． It will also take passengers to popular tourist attractions including Zhangjiajie，Xi'an，Guilin and minority areas in western Hunan and Hubei．
"The country is now shifting its focus and investing in the western regions and economically underdeveloped areas，making up for China's long debt to these areas，" Tan yuzhi，professor of the School of Economics and Management at Hubei University for Nationalities， told local media． " The project will significantly narrow regional disparities（差异） and solve minority issues．"
However，Deng Hongbing，director of China University of Geosciences' Center for Regional Economic and Investment Center，said that if the north-to-south railway is to go ahead，there needs to be a sound ecological program in place to ensure the protection of these underdeveloped and ecologically sensitive areas．
1.What is the passage mainly talking about？ ______
A.China has decided to invest in the western areas．
B.Another high-speed train line is being planned．
C.The train will speed up to 350 kilometers per hour．
D.China has produced the best high-speed train line．
2.How many provinces will the proposed line cross？ ______.
A.9 B.8
C.7 D.6
3.Once the high-speed rain line is built，______ ．
A.It will be the most convenient high-speed rail line in China
B.It will benefit the underdeveloped areas a lot in the west
C.It will transport goods faster from north to south
D.It will do good to the environment alongside the line
4.What is Tan Yuzhi's attitude towards the proposed project？ ______.
A.Ironical B.Doubtful
C.Puzzled D.Supportive
高二英语阅读理解中等难度题查看答案及解析
The Pacific island nation of Nauru used to be a beautiful place. Now it is an ecological disaster area. Nauru’s heartbreaking story could have one good consequence — other countries might learn from its mistakes.
For thousands of years, Polynesian people lived the remote island of Nauru, far from western civilization. The first European to arrive was John Fearn in 1798. He was the British captain of the Hunter, a whaling ship. He called the island Pleasant Island.
However, because it was very remote, Nauru had little communication with Europeans at first. The whaling ships and other traders began to visit, bringing guns and alcohol. These elements destroyed the social balance of the twelve family groups on the island. A ten-year civil war started, which reduced the population from 1,400 to 900.
Nauru’s real troubles began in 1899 when a British mining company discovered phosphate(磷酸盐)on the island. In fact, it found that the island of Nauru was nearly all phosphate, which a very important fertilizer for farming. The company began mining the phosphate.
A phosphate mine is not a hole in the ground; it is a strip mine. When a company strip-mines, it removes the top layer of soil. Then it takes away the material it wants. Strip mining totally destroys the land. Gradually, the lovely island of Nauru started to look like the moon.
In 1968, Nauru became one of the richest countries in the world. Every year the government received millions and millions of dollars for its phosphate.
Unfortunately, the leaders invested the money unwisely and lost millions of dollars. In addition, they used millions more dollars for personal expenses. Soon people realized that they had a terrible problem — their phosphate was running out. Ninety percent of their island was destroyed and they had nothing. By 2000, Nauru was financially ruined. Experts say that it would take approximately $433,600,000 and more than 20 years to repair the island. This will probably never happen.
1.What might be the author's purpose in writing the text?
A.To seek help for Nauru's problems.
B.To give a warning to other countries.
C.To show the importance of money.
D.To tell a heartbreaking story of a war.
2.What was Nauru like before the Europeans came?
A.Rich and powerful. B.Modern and open.
C.Peaceful and attractive. D.Greedy and aggressive.
3.The ecological disaster in Nauru resulted from _______.
A.soil pollution B.phosphate overmining
C.farming activity D.whale hunting
4.Which of the following was a cause of Nauru's financial problem?
A.Its leaders misused the money.
B.It spent too much repairing the island.
C.Its phosphate mining cost much money.
D.It lost millions of dollars in the civil war.
5.What can we learn about Nauru from the last paragraph?
A.The ecological damage is difficult to repair.
B.The leaders will take the experts'words seriously.
C.The island was abandoned by the Nauruans.
D.The phosphate mines were destroyed.
高二英语阅读理解中等难度题查看答案及解析
The Pacific island nation of Nauru used to be a beautiful place. Now it is an ecological disaster area. Nauru’s heartbreaking story could have one good consequence — other countries might learn from its mistakes.
For thousands of years, Polynesian people lived in the remote island of Nauru, far from western civilization. The first European to arrive was John Fearn in 1798. He was the British captain of the Hunter, a whaling ship. He called the island Pleasant Island.
However, because it was very remote, Nauru had little communication with Europeans at first. The whaling ships and other traders began to visit, bringing guns and alcohol. These elements destroyed the social balance of the twelve family groups on the island. A ten-year civil war started, which reduced the population from 1,400 to 900.
Nauru’s real troubles began in 1899 when a British mining company discovered phosphate (磷酸盐)on the island. In fact, it found that the island of Nauru was nearly all phosphate, which was a very important fertilizer for farming. The company began mining the phosphate.
A phosphate mine is not a hole in the ground; it is a strip mine(露天矿). When a company strip-mines, it removes the top layer of soil. Then it takes away the material it wants. Strip mining totally destroys the land. Gradually, the lovely island of Nauru started to look like the moon.
In 1968, Nauru became one of the richest countries in the world. Every year the government received millions and millions of dollars for its phosphate.
Unfortunately, the leaders invested the money unwisely and lost millions of dollars. In addition, they used millions more dollars for personal expenses. Soon people realized that they had a terrible problem — their phosphate was running out. Ninety percent of their island was destroyed and they had nothing. By 2000, Nauru was financially ruined. Experts say that it would take approximately $433,600,000 and more than 20 years to repair the island. This will probably never happen.
1.What was Nauru like before the Europeans came?
A. Rich and powerful
B. Peaceful and attractive
C. Modern and open
D. Greedy and aggressive
2.The ecological disaster in Nauru resulted from _____________.
A. whale hunting
B. phosphate overmining
C. farming activity
D. soil pollution
3.What can we learn about Nauru from the last paragraph?
A. The ecological damage is difficult to repair.
B. The leaders will take the experts’ words seriously.
C. The island was abandoned by the Nauruans.
D. The phosphate mines were destroyed.
4.What might be the author’s purpose in writing the text?
A. To tell a heartbreaking story of a war.
B. To seek help for Nauru’s problems.
C. To show the importance of money.
D. To give a warning to other countries.
高二英语阅读理解中等难度题查看答案及解析
The Pacific island nation of Nauru used to be a beautiful place. Now it is an ecological disaster area. Nauru’s heartbreaking story could have one good consequence — other countries might learn from its mistakes.
For thousands of years, Polynesian people lived on the remote island of Nauru, far from western civilization. The first European to arrive was John Fearn in 1798. He was the British captain of the Hunter, a whaling ship. He called the island Pleasant Island.
However, because it was very remote, Nauru had little communication with Europeans at first. The whaling ships and other traders began to visit, bringing guns and alcohol. These elements destroyed the social balance of the twelve family groups on the island. A ten-year civil war started, which reduced the population from 1,400 to 900.
Nauru’s real troubles began in 1899 when a British mining company discovered phosphate (磷酸盐)on the island. In fact, it found that the island of Nauru was nearly all phosphate, which is a very important fertilizer for farming. The company began mining the phosphate.
A phosphate mine is not a hole in the ground; it is a strip mine. When a company strip-mines, it removes the top layer of soil. Then it takes away the material it wants. Strip mining totally destroys the land. Gradually, the lovely island of Nauru started to look like the moon.
In 1968, Nauru became one of the richest countries in the world. Every year the government received millions and millions of dollars for its phosphate.
Unfortunately, the leaders invested the money unwisely and lost millions of dollars. In addition, they used millions more dollars for personal expenses. Soon people realized that they had a terrible problem — their phosphate was running out. Ninety percent of their island was destroyed and they had nothing. By 2000, Nauru was financially ruined. Experts say that it would take approximately $433,600,000 and more than 20 years to repair the island. This will probably never happen.
1.What might be the author’s purpose in writing the text?________.
A．To seek help for Nauru’s problems.
B．To give a warning to other countries
C．To show the importance of money.
D．To tell a heartbreaking story of a war.
2.What was Nauru like before the Europeans came? ________.
A．Rich and powerful B．Modern and open
C．Peaceful and attractive D．Greedy and aggressive
3.The ecological disaster in Nauru resulted from _______.
A．soil pollution B．phosphate overmining
C．farming activity D．whale hunting
4.Which of the following was a cause of Nauru’s financial problem? ________.
A．Its leaders misused the money
B．It spent too much repairing the island
C．Its phosphate mining cost much money
D．It lost millions of dollars in the civil war.
5.What can we learn about Nauru from the last paragraph?_ _______.
A．The phosphate mines were destroyed
B．The ecological damage is difficult to repair.
C．The island was abandoned by the Nauruans
D．The leaders will take the experts’ words seriously.
高二英语阅读理解中等难度题查看答案及解析
Big trees are incredibly important ecologically. For a start, they provide food for countless other species and shelter for many animals. With their tall branches in the sun, they capture vast amounts of energy. This allows them to produce massive crops of fruit and flowers that sustain much of the animal life in the forest.
Only a small number of tree species have the genetic ability to grow really big. The biggest are native to North America, but big trees grow all over the globe, from the tropics to the forests of the high latitudes (纬度). To achieve giant size, a tree needs three things: the right place to establish its seedling, good growing conditions and lots of time with low adult death rate. Lose any of these, and you will lose your biggest trees.
In some parts of the world, populations of big trees are dwindling(逐渐变少) because their seedlings cannot survive. In southern India, for instance, an aggressive non-native bush, Lantana camara, is invading the floor of many forests. Lantana grows so thickly that young trees often fail to take root. With no young trees to replace them, it is only a matter of time before most of the big trees disappear.
Without the right growing conditions, trees cannot get really big and there is some evidence to suggest tree growth could slow in a warmer world, particularly in environments that are already warm. Having worked for decades at La Selva Biological Station in Puerto Viejo de Sarapiqui, Costa Rica, David and Deborah Clark and colleagues have shown that tree growth there declines markedly in warmer years. “During the day, their growth shuts down when it gets too warm, and at night they consume more energy because their metabolic (新陈代谢) rate increases,” explains David Clark. With less energy produced in warmer years and more being consumed just to survive, there is even less energy available for growth.
The Clarks’ theory, if correct, means tropical forests would shrink over time. The largest, oldest trees would progressively die off and tend not to be replaced. According to the Clarks, this might cause a destabilization(不稳定) of the climate; as older trees die, forests would release some of their stored carbon into the atmosphere, causing a cycle of further warming, forest shrinkage and carbon emissions.
Besides, big trees face threats from elsewhere.
1.According to the passage, big trees make great contributions to the ecosystem because .
A. they can capture large amounts of energy.
B. they determine the change of global climate.
C. they provide the essentials for many creatures.
D. they can avoid a new cycle of further warming.
2.All the following factors are a must for making big trees EXCEPT .
A. no deadly damage B. genetic contribution
C. ideal environment for growth D. high-latitude location
3.What is the best title of the passage?
A. Big trees in trouble. B. Advantages of big trees.
C. Results of big trees’ disappearing. D. Importance of big trees to humans.
4.What will the author most probably discuss after the last paragraph?
A. More threats to the existence of big trees.
B. The effect of human activities on big trees.
C. Benefits of big trees to the whole atmosphere.
D. Comparison between common trees and big ones.
高二英语阅读理解中等难度题查看答案及解析
Big trees are very important in ecology. For a start, they provide food for countless other species and shelter for many animals. With their tall branches in the sun, they take in vast amounts of energy. This allows them to produce massive crops of fruit and flowers that much of the animal life in the forest feed on.
Only a small number of tree species have the genetic(基因的) ability to grow really big. The biggest are native to North America, but big trees grow all over the globe, from the tropics(热带地区) to the forests of the high latitudes(纬度). To achieve giant size, a tree needs three things: the right place to establish(建立) its seedling, good growing conditions and lots of time with low adult death rate. Lose any of these, and you will lose your biggest trees.
In some parts of the world, populations of big trees are dwindling because their seedlings cannot survive. In southern India, for instance, an aggressive non-native bush, Lantana camara, is invading the floor of many forests. Lantana grows so thickly that young trees often fail to take root. With no young trees to replace them, it is only a matter of time before most of the big trees disappear.
Without the right growing conditions, trees cannot get really big and there is some evidence to suggest tree growth could slow in a warmer world, particularly in environments that are already warm. Having worked for decades at La Selva Biological Station in Puerto Viejo de Sarapiqui, Costa Rica, David and Deborah Clark and colleagues have shown that tree growth there slows obviously in warmer years. “During the day, their growth shuts down when it gets too warm, and at night they consume more energy because their metabolic(新陈代谢的) rate increases,” explains David Clark. With less energy produced in warmer years and more being consumed just to survive, there is even less energy available for growth.
The Clarks’ theory, if correct, means tropical forests would be smaller over time. The largest, oldest trees would gradually die off and tend not to be replaced. According to the Clarks, this might cause a destabilization of the climate; as older trees die, forests would release some of their stored carbon into the atmosphere, causing a cycle of further warming, forest shrinkage and carbon emissions.
Besides, big trees face threats from elsewhere.
1.According to the passage, big trees make great contributions to the ecosystem because ________.
A. they can take in large amounts of energy
B. they determine the change of global climate
C. they provide the essentials for many creatures
D. they can improve a new cycle of further warming
2.All the following factors are a must for making big trees EXCEPT ______.
A. no deadly damage
B. the suitable place for new plants’ growing
C. good environment for growth
D. the highest location
3.The word “dwindling” (paragraph3) is closest in meaning to “______”.
A. exploding B. growing
C. changing D. dropping
4.What is the best title of the passage?
A. Big trees in trouble.
B. Advantages of big trees.
C. Results of big trees’ disappearing.
D. Importance of big trees to humans.
5.What will the author most probably discuss after the last paragraph?
A. More threats to the existence of big trees.
B. The effect of human activities on big trees.
C. Benefits of big trees to the whole atmosphere.
D. Comparison between common trees and big ones.
高二英语阅读理解中等难度题查看答案及解析
阅读下列短文，从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
Big trees are incredibly important ecologically. For a start, they provide food for countless other species and shelter for many animals. With their tall branches in the sun, they capture vast amounts of energy. This allows them to produce massive crops of fruit and flowers that sustain much of the animal life in the forest.
Only a small number of tree species have the genetic ability to grow really big. The biggest are native to North America, but big trees grow all over the globe, from the tropics to the forests of the high latitudes(纬度). To achieve giant size, a tree needs three things: the right place to establish its seeding, good growing conditions and lots of time with low adult death rate. Lose any of these, and you will lose your biggest trees.
In some parts of the world, populations of big trees are dwindling because their seedings cannot survive. In southern India, for instance, an aggressive non-native bush, Lantana camara, is invading the floor of many forests. Lantana grows so thickly that young trees often fail to take root. With no young trees to replace them, it is only a matter of time before most of the big trees disappear.
Without the right growing conditions, trees cannot get really big and there is some evidence to suggest tree growth could slow in a warmer world, particularly in environments that are already warm. Having worked for decades at La Selva Biological Station in Puerto Viejo de Sarapiqui, Costa Rica, David and Deborah Clark and colleagues have shown that tree growth there declines markedly in warmer years. “During the day, their growth shuts down when it gets too warm, and at night they consume more energy because their metabolic(新陈代谢的)rate increases,” explains David Clark. With less energy produced in warmer years and more being consumed just to survive, there is even less energy available for growth.
The Clarks’ theory, if correct, means tropical forests would shrink over time. The largest, oldest trees would progressively die off and tend not to be replaced. According to the Clarks, this might cause a destabilization of the climate; as older trees die, forests would release some of their stored carbon into the atmosphere, causing a cycle of further warming, forest shrinkage and carbon emissions.
Besides, big trees face threats from elsewhere.
1. All the following factors are a must for making big trees EXCEPT_________.
A. genetic contribution
B. no deadly damage
C. ideal environment for growth
D. right place to establish its seeding
2.The word “dwindling”(paragraph3) is closest in meaning to “_______”.
A. exploding B. decreasing
C. changing D. growing
3. What is the best title of the passage?
A. Results of big trees’ disappearing.
B. Advantage of big trees.
C. Big trees in trouble
D. Importance of big trees to humans.
4.What will the author most probably discuss after the last paragraph?
A. Comparison between common trees and big ones.
B. The effect of human activities on big trees.
C. Benefits of big trees to the whole atmosphere.
D. More threats to the existence of big trees.
高二英语阅读理解中等难度题查看答案及解析