Humans have always been curious about what Earth was like thousands of years ago. To learn more about the plants and animals that lived during that time, scientists examine their fossils or other remains. In recent years, genetics, and in particular the the study of DNA, has become an important tool for these scientists. Some people even dream of bringing ancient creatures such as dinosaurs back to life. Although no animals have been brought back yet, scientists have managed to grow a number of ancient plants from seeds. By far theoldest of these plants is a 32,000-year-old plant that has been grown again by Russian scientists.
The plant is a flower called Silenestenophylla, which used to grow in Siberia in eastern Russia. The scientists discovered seeds and fruits of the plant buried deep below the ground. They believe the seeds and fruits were put there by an ancient animal which stored them to eat during the winter. The seeds that scientists found failed to grow because they were damaged. However, the scientists were able to take genetic material from the fruit to grow a new plant. Then, this plant produced new seeds which the scientists were able to use to grow more plants.
A modern relative of the original flower still grows in Siberia, but when the ancient flower was grown, it had some important differences from the modern flower. The petals on the ancient flower were much longer and also spaced further apart. Studying the ancient flower will allow the scientists to learn more about how plants have evolved.
Before this, the oldest seed to have been grown was from a 2,000-year-year-old tree in Israel. The Russian scientists believe the reason why the Siberian seeds were preserved for so long is that they were buried in permanently frozen earth, which protected the genetic information in the seeds. The scientists believe that the permanently frozen soil in Siberia contains many other ancient seeds, so they may be able to bring back even older plants. This will help them better understand the history of plants and how they have changed over time.
1.Recently, scientist have ________.
A.been able to bring a number of ancient animals back to life
B.begun using genetics to learn more about ancient plants and animals
C.started to create a dinosaur that could live on Earth today
D.tried to create new types of fossils to study how animals used to live
2.How were Russian scientists able to grow Silenestenophylla?
A.They used genetic material from an ancient fruit they discovered.
B.They used ancient seeds that they had found deep below the ground.
C.They planted the seeds deep in the ground to protect them during the cold winter.
D.They planted fruit in a new kind of container that they had specially designed.
3.What is one thing the Russian scientists learned by comparing the ancient plant with its modern relative?
A.The plant used to produce fewer flowers than it produces now.
B.The plant has evolved to have shorter petals on its flowers.
C.The ancient plant was a different color from its modern relative.
D.The modern plant is found across a wider area of Russia than the ancient one.
4.The Russian scientists believe that ________.
A.it is unlikely that they can grow plants from seeds that are over 2,000 years old
B.ancient seeds that were kept in Israel will be easier to grow than Russian seeds
C.they will be able to grow plants in areas where the earth is permanently frozen
D.the frozen soil in Siberia is able to keep the DNA of plants safe for a long time
5.Which of the following statements is true?
A.Russian scientists would like to use frozen earth to protect seeds.
B.Human DNA can be used to help scientists learn more about the genetic history of plants.
C.The fruit and seeds of Silenestenophylla may have been buried by an ancient animal.
D.The first plant that had flowers grew in Siberia over 32,000 years ago.
高一英语阅读理解中等难度题
Humans have always been curious about what Earth was like thousands of years ago. To learn more about the plants and animals that lived during that time, scientists examine their fossils or other remains. In recent years, genetics, and in particular the the study of DNA, has become an important tool for these scientists. Some people even dream of bringing ancient creatures such as dinosaurs back to life. Although no animals have been brought back yet, scientists have managed to grow a number of ancient plants from seeds. By far theoldest of these plants is a 32,000-year-old plant that has been grown again by Russian scientists.
The plant is a flower called Silenestenophylla, which used to grow in Siberia in eastern Russia. The scientists discovered seeds and fruits of the plant buried deep below the ground. They believe the seeds and fruits were put there by an ancient animal which stored them to eat during the winter. The seeds that scientists found failed to grow because they were damaged. However, the scientists were able to take genetic material from the fruit to grow a new plant. Then, this plant produced new seeds which the scientists were able to use to grow more plants.
A modern relative of the original flower still grows in Siberia, but when the ancient flower was grown, it had some important differences from the modern flower. The petals on the ancient flower were much longer and also spaced further apart. Studying the ancient flower will allow the scientists to learn more about how plants have evolved.
Before this, the oldest seed to have been grown was from a 2,000-year-year-old tree in Israel. The Russian scientists believe the reason why the Siberian seeds were preserved for so long is that they were buried in permanently frozen earth, which protected the genetic information in the seeds. The scientists believe that the permanently frozen soil in Siberia contains many other ancient seeds, so they may be able to bring back even older plants. This will help them better understand the history of plants and how they have changed over time.
1.Recently, scientist have ________.
A.been able to bring a number of ancient animals back to life
B.begun using genetics to learn more about ancient plants and animals
C.started to create a dinosaur that could live on Earth today
D.tried to create new types of fossils to study how animals used to live
2.How were Russian scientists able to grow Silenestenophylla?
A.They used genetic material from an ancient fruit they discovered.
B.They used ancient seeds that they had found deep below the ground.
C.They planted the seeds deep in the ground to protect them during the cold winter.
D.They planted fruit in a new kind of container that they had specially designed.
3.What is one thing the Russian scientists learned by comparing the ancient plant with its modern relative?
A.The plant used to produce fewer flowers than it produces now.
B.The plant has evolved to have shorter petals on its flowers.
C.The ancient plant was a different color from its modern relative.
D.The modern plant is found across a wider area of Russia than the ancient one.
4.The Russian scientists believe that ________.
A.it is unlikely that they can grow plants from seeds that are over 2,000 years old
B.ancient seeds that were kept in Israel will be easier to grow than Russian seeds
C.they will be able to grow plants in areas where the earth is permanently frozen
D.the frozen soil in Siberia is able to keep the DNA of plants safe for a long time
5.Which of the following statements is true?
A.Russian scientists would like to use frozen earth to protect seeds.
B.Human DNA can be used to help scientists learn more about the genetic history of plants.
C.The fruit and seeds of Silenestenophylla may have been buried by an ancient animal.
D.The first plant that had flowers grew in Siberia over 32,000 years ago.
高一英语阅读理解中等难度题查看答案及解析
People have always been curious ________ how living things on the earth exactly began.
A. in B. at C. of D. about
高一英语单项填空中等难度题查看答案及解析
People have always been curious _________ how living things on the earth began.
A. in B. at C. of D. about
高一英语单项填空简单题查看答案及解析
People have always been wondering about what our future will look like. Go on reading this text, and you will know what will happen in the next fifty years.
How can we know what the future will look like? To be able to understand the future, you must know the past. What has taken us to where we are today and what has changed along the way? The world has changed a lot in the last 150 years, but we humans are driven by the same basic needs as we were 150 years ago. Will this change in the next 150 years? No.
What inventions have really made a difference in the last 150 years? In the past years, the inventions that have affected most people around the world for everyday living are the telephone, electricity, radio, television, computer, the car and the ability to communicate through the Internet. Then we of course have a lot of inventions that have made life easier, like new medicine, faster transports etc. In general, human beings have been working hard in the last 150 years to make the inventions so that they will be able to get control of the time and the world. Since there is still much to do in this area, this will be the focus at least for the next 150 years.
Why do we need to predict the future? Predicting the future is important for two reasons: first we need to start to think about what kind of future we would like for ourselves and to pass on to the next generation, and then we need to know what decisions we need to make today that will give the best result in the future.
1.What does the author try to tell us in the second paragraph?
A. Our basic needs will not change in the future.
B. The world is quite different from what it was.
C. Humans will no longer enjoy food in the future.
D. The world will be completely changed tomorrow.
2.Our past inventions have made .
A. our daily life more stressful
B. it easy for us to live
C. our work easily done
D. us work less time
3.What will humans do in order to keep the world under control?
A. To produce more cars for transportation.
B. To spend more time working on the Internet.
C. To work much harder to achieve their goals.
D. To focus on making more inventions.
4.What is the main idea of the last paragraph?
A. What result we’ll receive in the future.
B. The two reasons of predicting the future.
C. The importance of predicting the future.
D. The decisions we make for our future.
高一英语阅读理解中等难度题查看答案及解析
My parents have always been _________ travelling whenever they get the chance.
A. curious about B. pleased with
C. concerned about D. keen on
高一英语单项填空中等难度题查看答案及解析
A report has recently been published about what the earth might be like 20 years or so from now on. The report is a result of a three-year46.
According to the report, the picture of the earth in the year 2020 is not a47one. The world will be more48because the population will continue to grow. The population could be499,000 million, almost 3,000 million more than that in 2009. More people would move into cities, especially cities in50countries. Cities in India and Thailand probably would51have a population of 20 million by then.
Food production will52, but not enough to feed all the people. Farmers will grow 90% more food than they did in 2009,53most of the increase would be in countries that54produce enough food for their people. Little increase is55 in South Asia, Africa or the Middle East. Poor farming ways are 56large areas of cropland, changing farms into deserts. More farmland is57as cities become larger and more houses are built.58will get worse as developed countries burn more coal and oil. Many of the world’s59could disappear as more and more trees are cut down. Energy will continue to be a serious problem. The experts say their60 of the earth for the year 2020 may be wrong. They only 61 the situation as it is today. By changing the situation, by62the problems, the picture can be changed. There is63time for the nations of the world to64 a plan of action. But they considered that 65too long to make a decision would greatly reduce the chances of success
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2.A.pleased B.pleasant C.safe C.blue
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11..
| A．destroying | B．protecting | C．bothering | D．interrupting |
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17..
| A．solving | B．working | C．answering | D．dealing |
18..
| A．no | B．still | C．less | D．lots of |
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高一英语完型填空中等难度题查看答案及解析
If he shouldn’t have been so ____ about his food, he would be healthier now.
A. special B. curious C. particular D. anxious
高一英语单项填空困难题查看答案及解析
—What was his performance like?
—Oh, it couldn’t have been___．
| A．less wonderful | B．more wonderful |
| C．much wonderful | D．the most wonderful |
高一英语单项填空简单题查看答案及解析
Computers have been made ______ clever that they can ______ problems like humans _______.
A. such; deal with; in some way B. so; do with; in one way
C. such; do with; in the way D. so; deal with; in a way
高一英语单项填空简单题查看答案及解析
听下面一段独白，回答以下小题。
1.How long have Earth Boxes been in market?
A.About 15 years. B.About 25 years. C.About 30 years.
2.What can Earth Boxes be used to do in poor countries?
A.Solve hunger problems.
B.Improve soil conditions.
C.Teach students science.
3.What is the advantage of Earth Boxes?
A.Saving much space.
B.Purifying much water.
C.Making crops grow fast.
4.Why are Earth Boxes used in middle school?
A.To learn math well.
B.To grow vegetables.
C.To do some experiments.
高一英语短文中等难度题查看答案及解析