Mình đang cần gấp Exercise 2: Scientists therefore agree that it is time (1) the spread of global warming before it is too late. Solar radiation and volcanic emissions (2) produce natural global warming. Yet, the major responsibility for turning global warming into a potential dangerous activity falls on humans. Ever since the Industrial Revolution, the burning of fossil fuels to power cars and generate electricity (3) to the ever-increasing emission of toxic carbon monoxide and carbon dioxide into the atmosphere. These gases trap heat and lead to the formation of the so-called greenhouse effect, which in turn (4) global temperatures. Only decisive government measures will curb down and limit the growth of this destructive (5) on our planet. 1. A. stop B. to stop C. stopping D. stops 2. A. doubt B. doubted C. doubtfully D. undoubtedly 3. A. has led B. have led C. leading D. lead 4. A. rises B. raises C. lies D. lays 5. A. affect B. effect C. access D. fact Exercise 3: A new study shows that women can reduce their chances of developing heart disease by (1) for about three hours every week. The researchers at Harvard Medical University in Boston have just reported the results (2) the study on the New England Journal of Medicine. The study is the first to show the effectiveness of jogging in the developing of heart disease in women. Only (3) earlier studies have examined the effects of jogging on the heart, but nearly all have been done on men. The new study involves more than 72,000 women (4) the ages of forty and sixty-five during a period of eight years. The researchers have found that women (5) jog at least three hours a week have a thirty to forty percent lower chance of owning a heart attack than those who do not. 1. A. by B. to C. of D. in 2. A. of B. on C. into D. in 3. A. many B. much C. a little D. a few 4. A. behind B. between C. toward D. from 5. A. who B. where C. how D. when Exercise 4: Our arrival in New York was spectacular. It’s skyscrapers and the Statue of Liberty make a (1) sight. New York has a population of over seven million and it is probably the world’s most famous city. The inhabitants of the “Big Apple” come (2) many different countries. There are more nationalities in New York (3) in any other places on the earth. It is also has more tourists than any other city except London, especially in the summer. (4) come from all over the world and have a wonderful time. There are so many (5) for them to get enthusiastic about – whether it’s some of the best museums in the world or the charming little streets of Greenwich Village. 1. A. beauty B. beautiful C. beautifully D. beautify 2. A. from B. for C. in D. by 3. A. than B. rather C. of D. to 4. A. Visit B. Visitors C. Visiting D. Visited 5. A. view B. place C. area D. sights Exercise 5: Electricity is the (1) common form of energy used today. In the modern world, electricity is instantly available at a touch of a switch. Electricity has many (2) . The most common use of electricity is to provide artificial lighting. (3) factories, electricity is used to drive the electric motors of machines. In offices, electricity is used to light up the (4) . It’s also used to operate air-conditioners, computers (5) many other machines. 1. A. much B. many C. more D. most 2. A. types B. uses C. labels D. ways 3. A. At B. On C. In D. By 4. A. paper B. workplace C. machine D. tool 5. A. but B. so C. for D. and Exercise 6: Air pollution is a cause of ill-health in human beings. In a lot of countries, there are laws limiting the amount of smoke which factories can produce. (1) there isn’t enough information on the effects of smoke in the atmosphere, doctors have proved that air pollution (2) lung diseases. The gases from the exhausts of car have also increased air pollution in most cities. The lead in petrol produces a (3) gas which often collects in busy streets surrounded by high buildings. Children (4) live in areas where there is a lot of lead in the atmosphere cannot think as quickly as other children and are clumsy when they use their hands. There are other long-term effects of pollution. If the gases in the atmosphere continue to increase, the earth’s climate may become (5) . A lot of the ice near the Pole may melt and may cause serious flood. 1. A. However B. Though C. Therefore D. Despite 2. A. makes B. does C. gets D. causes 3. A. dirty B. powerful C. poisonous D. harmless 4. A. when B. who C. where D. which 5. A. warmer B. warmest C. warm D. warming