Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms  have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.
Câu 1: What is the topic of the passage?


A. The search for intelligent life   


B. Conditions necessary for life


C. Characteristics of extraterrestrial life


D. Life in our solar system
Câu 2: All of the following are mentioned in the passage as necessary for the development of life except    


A. rock      


B. carbon   


C. oxygen   


D. water
Câu 3: The word “which” in paragraph 3 refers to


A. star      


B. zone  


C. region  


D. planet
Câu 4: It can be inferred from paragraph 3 that       


A. the Earth is in the sun’s habitable zone


B. the Earth is tidally locked to the sun


C. the sun varies in its luminosity 


D. variations in luminosity help life to develop
Câu 5: The word “sustain” in paragraph 3 could best be replaced by     


A. assist   


B. have 


C. need


D. experience
Câu 6: In order for life to develop, a planet’s orbit must not be    


A. stable         


B. very close to another planet’s orbit


C. on the same planet as another planet’s orbit 


D. less wide than the star’s habitable zone
Câu 7: It can be inferred from paragraph 4 that      


A. most stars have more than two planets in their habitable zones


B. no star has more than two planets in its habitable zone


C. it is not possible for a star to have three planets with life on them


D. for life to develop, a star must have at least two planets in its habitable zone
Câu 8: Which of the following best expresses the essential information in the highlighted sentence in the passage?


A. Because of their nearness, habitable planets orbiting smaller stars usually have either constant daylight or constant night.


B. The habitable zones of small stars are so close to the star that planets within them do not spin.


C. One problem with some stars is that their habitable zones are tidally locked into either light or darkness.


D. Some stars become tidally locked, so that they only shine light on one side of a planet.
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Read the following passage and write the letter A, B, C or D on the top of the first page to indicate the correct answer to each of the questions.            In the course of its history, human inventions have dramatically increased the average amount of energy available for use per person. Primitive peoples in cold regions burned wood and animal dung to heat their caves, cook food, and drive off animals by fire. The first step toward the developing of more efficient fuels was taken when people discovered that they could use vegetable oils and animal fats in lieu of gathered or cut wood. Charcoal gave off more intensive heat than wood and was more easily obtainable than organic fats. The Greeks first began to use coal for metal smelting in the 4th century, but it did not come into extensive use until the Industrial Revolution.           In the 1700s, at the beginning of the Industrial Revolution, most energy used in the United States and other nations undergoing industrialization was obtained from perpetual and renewable sources, such as wood, water streams, domesticated animal labor, and wind. These were predominantly locally available supplies. By mid-1800s, 91 percent of all commercial energy consumed in the United States and European countries was obtained from wood. However, at the beginning of the 20th century, coal became a major energy source and replaced wood in industrializing countries. Although in most regions and climate zones wood was more readily accessible than coal, the latter represents a more concentrated source of energy. In 1910, natural gas and oil firmly replaced coal as the main source of fuel because they are lighter and, therefore, cheaper to transport. They burned more cleanly than coal and polluted less. Unlike coal, oil could be refined to manufacture liquid fuels for vehicles, a very important consideration in the early 1900s, when the automobile arrived on the scene.By 1984, non-renewable fossil fuels, such as oil, coal, and natural gas, provided over 82 percent of the commercial and industrial energy used in the world. Small amounts of energy were derived from nuclear fission, and the remaining 16 percent came from burning direct perpetual and renewable fuels, such as biomass. Between 1700 and 1986, a large number of countries shifted from the use of energy from local sources to a centralized generation of hydropower and solar energy converted to electricity. The energy derived from non-renewable fossil fuels has been increasingly produced in one location and transported to another, as is the case with most automobile fuels. In countries with private, rather than public transportation, the age of non-renewable fuels has created a dependency on a finite resource that will have to be replaced.Alternative fuel sources are numerous, and shale oil and hydrocarbons are just two examples. The extraction of shale oil from large deposits in Asian and European regions has proven to be labor consuming and costly. The resulting product is sulfur-and nitrogen-rich, and large scale extractions are presently prohibitive. Similarly, the extraction of hydrocarbons from tar sands in Alberta and Utah is complex. Semi-solid hydrocarbons cannot be easily separated from the sandstone and limestone that carry them, and modern technology is not sufficiently versatile for a large-scale removal of the material. However, both sources of fuel may eventually be needed as petroleum prices continue to rise and limitations in fossil fuel availability make alternative deposits more attractive.
Câu 1: What is the main topic of the passage?


A. Application of various fuels


B. Natural resources and fossil fuels


C. A history of energy use


D. A historical review of energy rates
Câu 2: It can be inferred from the first paragraph that


A.  coal mining was essential for primitive peoples


B.  the Greeks used coal in industrial productions


C.  the development of efficient fuel was a gradual process


D.  the discovery of efficient fuels was mostly accidental 
Câu 3: The author of the passage implies that in the 1700s, sources of energy were


A. used for commercial purposes


B. used in various combination


C. not derived from mineral deposits


D.  it could be converted to automobile fuel.
Câu 4: The phrase “the latter” refers to


A. wood


B. coal


C. most regions


D.  climate zones
Câu 5: According to the passage, what was the greatest advantage of oil as fuel?


A. it was a concentrated source of energy.


B. it was lighter and cheaper than coal.


C.  it replaced wood and coal and reduced pollution.


D.  it could be converted to automobile fuel.
Câu 6: It can be inferred from the passage that in the early 20th centurgy, energy was obtained primarily from


A. Fossil fuels


B. Nuclear fission


C. Hydraulic and solar sources


D. Burning biomass
Câu 7: The author of the passage implies that alternative sources ò fuel are curently


A.  being used for consumption  


B.  available in few locations


C. being explored


D. examined on a large scale 
Câu 8: The word “prohibitive” is closest in meaning to


A.  prohibited


B. provided


C.  too expensive


D.  too expedient
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Mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the blanks
Câu 1: He is sleeping in his mother’s house this week as he …..his house painted.


A. has


B. is having


C. had


D. has had 
Câu 2: John and Karen persuaded me ….. the conference.


A. attending


B. attended


C. to attend


D. to have attended
Câu 3: I think it’s ….. to take a few more pictures.


A. enough light


B.  lightly enough


C.  light enough


D.  enough as light 
Câu 4: Flower oils are ….. of the ingredients used in making perfume.


A. among expensive


B. among the most expensive


C. being most expensive


D.  expensive 
Câu 5: ….I heard the phone ring, I didn’t answer it.


A. because


B. Only if


C. Even though


D.  Provided that
Câu 6: Ann has a lot of books, …… she has never read.


A. most of that


B. most of these


C. most of which


D. which most of them
Câu 7: My first school day was a ….. event in my life.
 


A. memory


B. memorized


C. memorial


D. memorable 
Câu 8: If we didn’t …. any measures to protect whales, they would disappear forever.


A. use


B. make


C. take


D. do
Câu 9: People who take on a second job inevitably ….. themselves to greater stress.


A. offer


B. subject


C.  field


D.  place 
Câu 10: One condition of this job is that you must be …… to work at weekends.


A. available


B. capable


C. acceptable


D. accessible 
Câu 11: Could you lend me some money to ….. me over to the end of the month?


A. hand


B. tide


C. get


D. make
Câu 12: It is the …..of stupidity to go walking in the mountains in this weather.


A. height


B. depth


C. source


D. matter
024.7300.7989
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B.
C.
D.