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2 năm trước
Exercise 2. Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
Einstein ____ a great impact on modern physics.
A.feels                        
B.does                        
C.appreciates                          
D.has
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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.
Humans are bringing about another global-scale change in the atmosphere: the increase in what are called greenhouse gases. Like glass in a greenhouse, these gases admit the Sun's light but tend to reflect back downward the heat that is radiated from the ground below, trapping heat in the Earth's atmosphere. This process is known as the greenhouse effect. Carbon dioxide is the most significant of these gases – there is 25 percent more carbon dioxide in the atmosphere today than there was a century ago, the result of our burning coal and fuels derived from oil. Methane, nitrous oxide, and CFCs are greenhouse gases as well.
Scientists predict that increases in these gases in the atmosphere will make the Earth a warmer place. They expect a global rise in average temperature somewhere between 1.0 and 3.5 degrees Celsius in the next century. Average temperatures have in fact been rising and the years from 1987 to 1997 were the warmest years on record. Some scientists are reluctant to say that global warming has actually begun because climate naturally varies from year to year and decade to decade, and it takes many years of records to be sure of a fundamental change. There is little disagreement, though, that global warming is looming.
Global warming will have different effects in different regions. A warmed world is expected to have more extreme weather, with more rain during wet periods, longer droughts, and more powerful storms. Although the effects of future climate changes are unknown, some predict that exaggerated weather conditions may translate into better agricultural yields in areas such as the western United States, where temperature and rainfall are expected to increase, while dramatic decreases in rainfall may lead to severe droughts and plunging agricultural yields in parts of Africa, for example.
Warmer temperatures are expected to partially melt the polar ice caps, leading to a projected sea level rise of 50 centimeters by the year 2050. A sea level rise of this magnitude would flood coastal cities, force people to abandon low-lying islands, and completely inundate coastal wetlands. Diseases like malaria, which at present are primarily found in the tropics, may become more common in the regions of the globe between the tropics and the polar regions, called the temperate zones. For many of the world's plant species, and for animal species that are not easily able to shift their territories as their habitat grows warmer, climate change may bring extinction.
(Source: Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation)
The word "looming" in paragraph 2 probably means                                       .  
A.fading
B.showing
C.ending
D.appearing

Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 46 to 50.
Since the birth of agriculture, farmers have tried to (46)_______  using pesticides by employing various biological methods to control nature. The first method involved introducing a predator that would control pests (47)_______ eating them. This was used successfully in 1925 to control the prickly pear population in Australia. The prickly pear has originally been used as a divider between paddocks. (48)_________ , it eventually spread from a few farms to 4 million hectares of farming land, rendering them unusable. The Cactoblastis moth larvae were introduced to help control the (49)_______ and within ten years, the prickly pear was virtually eradicated. Further attempts at biological control weren't so successful. When farmers tried to eliminate the cane beetle by introducing the South American cane toad, the results were catastrophic. The cane toad did not eat the cane beetle and the toad population spread (50)_______ leading to the decline of native species of mammals and reptiles.
(48) 
A.Although                
B.Therefore                
C.Then                       
D.However

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
Millions of people tune into the weather forecast each evening on television. Most of them imagine that the presenter does little more than arrive at the studio a few minutes before the broadcast, read the weather, and then go home. In fact, this image is far from the truth. The two-minute bulletin which we all rely on when we need to know tomorrow's weather is the result of a hard day's work by the presenter, who is actually a highly-qualified meteorologist. Every morning after arriving at the TV studios, the first task of the day is to collect the latest data from the National Meteorological Office. This office provides up-to-the-minute information about weather conditions throughout the day, both in Britain and around the world. The information is very detailed and includes predictions, satellite and radar pictures, as well as more technical data. After gathering all the relevant material from this office, the forecaster has to translate the scientific terminology and maps into images and words which viewers can easily understand. The final broadcast is then carefully planned. It is prepared in the same way as other programmes. The presenter decides what to say and in what order to say it. Next a "story board" is drawn up which lays out the script word for word. What makes a weather fore­cast more complicated than other programmes are the maps and electronic images which are required. The computer has to be programmed so that the pictures appear in the cor­rect order during the bulletin.
The time allocated for each broadcast can also alter. This is because the weather re­port is screened after the news, which can vary in length. The weather forecaster doesn't always know how much time is available, which means that he/she has to be thoroughly prepared so that the material can be adapted to the time available. Another related complication is that the weather forecast has to be a live broadcast; it cannot be pre-recorded. Live shows are very nerve-racking for the presenter because almost anything can go wrong. Perhaps the most worrying aspect for every weather fore­caster is getting the following day's predictions wrong. Unfortunately for them, this is not an unusual occurrence; the weather is not always possible to predict accurately. The weather is a national obsession in Britain, perhaps because it is so changeable. It’s the national talking point, and most people watch at least one day bulletin. It can be mortifying for a weather man or woman who has predicted rain for the morning to wake up to brilliant sunshine.
This day, a weather forecaster’s job is even more complicated because they are relied upon to predict other environmental conditions. For example, in the summer the weather forecast has to include reports on ultraviolet radiation intensity to help people avoid sunburn. The job of a weather forecaster is certainly far more complicated than just pointing at a map and describing weather conditions. It's a job for professionals who can cope with stressful and demanding conditions.
What perception do most people have of weather forecasters?
A.They have many qualifications.
B.They do a hard day’s work at the studio.
C.They work very short hours.  
D.They always tell the truth.

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