An alcohol breath test (ABT) is often used by the police to find out whether a person is drunk while driving. In the United States, the legal blood alcohol limit is 0.08% for people aged 21 years or older, while people under 21 are not allowed to drive a car with any level of alcohol in their body. A “positive” test result, a result over the legal limit, allows the police to arrest the driver. However, many people who tested positive on the test have claimed that they only drank a “non-alcoholic” energy drink. Can one of these energy drinks really cause someone to test positive on an ABT? Researchers in Missouri set up an experiment to find out.
First, the amount of alcohol in 27 different popular energy drinks was measured. All but one had an alcohol level greater than 0.005%. In nine of the 27 drinks, the alcohol level was at least 0.096%.The scientists then investigated the possibility that these small levels of alcohol could be discovered by an ABT. They asked test subjects to drink a full can or bottle of an energy drink and then gave each subject an ABT one minute and 15 minutes after the drink was finished.
For 11 of the 27energy drinks, the ABT did find the presence of alcohol if the test was given within one minute after the drink was taken. However, alcohol could not be discovered for any of the drinks if the test was given 15 minutes after the drink was consumed. This shows that when the test is taken plays an important role in the test result. The sooner the test is conducted after the consumption of these drinks, the more likely a positive alcohol reading will be obtained.What is the legal alcohol level for a 20-year-old driver in the US?
A.0.000%. | B.0.005%. | C.0.080%. | D.0.096%. |
What is the purpose of the Missouri experiment?
A.To warn people of the dangers of drinking energy drinks. |
B.To introduce a new method of calculating blood alcohol levels. |
C.To discover the relation between energy drinks and ABT test results. |
D.To change the current legal alcohol limit for drivers in the United States. |
The underlined word “subjects” in Paragraph 2 refers to_____.
A.the things that are being discussed |
B.areas of knowledge studied in school |
C.the person in an experiment |
D.the people who belong to a country |
Which of the following affects the ABT test result most for energy drink consumers?
A.The age of the person who takes the test. |
B.The place where the test is given. |
C.The equipment that the test uses. |
D.The time when the test is taken. |
We already know the fastest, least expensive way to slow climate change: Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets.
Not long ago, My wife, PJ, and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change. Scientists have reported recently that the world is bending up even faster than predicted only a few years ago, and that the consequences could be severe if we don’t keep reducing emissions(排放)of carbon dioxide(CO2)and other greenhouse gases that are trapping heat in our atmosphere.
We decided to try an experiment. For one month we recorded our personal emissions of CO2. . We wanted to see how much we could cut back, so we went on a strict diet. The average US household(家庭)produces about 150 pounds of CO2 a day by doing common-place things like turning on air-conditioning or driving cars. That’s more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses. But how much should we try to reduce?
For an answer, I checked with Tim Flannery, author of The Weather Makers: How Man Is Changing the Climate and What It Means for Life on Earth. In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the melting(融化)of the ice sheets in Greenland or West Antarctica. “To stay below that point, we need to reduce CO2 emissions by 80 percent,” he said.
Good advice, I thought. I’d opened our bedroom windows to let in the wind. We’d gotten so used to keeping our air-conditioning going around the clock. I’d almost forgotten the windows even opened. We should not let this happen again. It’s time for us to change our habits if necessary.
67. Why did the author and his wife try a new diet?
A. To take special kinds of food B. To respond to climate change.
C. To lose weight D. To improve their health
68. The underlined words “tipping points” most probably refer to________.
A. freezing points B. burning points C. melting points D. boiling points
69. It can be inferred from the passage that_________
A. it is necessary to keep the air-conditioning on all the time
B. it seems possible for every household to cut emissions of CO2
C. the average US household produces about 3,000 pounds of CO2 a month
D. the average European household produces about 1,000 pounds of CO2 a month
70. Which of the following would be the title for this passage?
A. Saving Energy Starts at Home
B. Changing Our Habits Begins at Work
C. Changing Climate Sounds Reasonable
D. Reducing Emission of CO2 proves Difficult
When a close friend dies, it often forces you to consider your own death. The more you have in common with the friend, the more his death will make you wonder about your own. Sometimes you will naturally say to yourself, "It could just as easily have been me." Such a death has a way of reminding us how fragile life is, and it may cause you to reassess(重新评价) the direction of your own life.
Jack's story is a good example. A successful businessman making a lot of money, Jack didn't spend as much time with his family as he wanted. His job required him to work long hours. But three years ago one of his best friends, a man who worked in the same office, had a heart attack. He died while celebrating his daughter's eighteenth birthday in a restaurant. He was only fifty years old.
Not long after his friend's death, Jack started to have a chest pain. Finally he had a good physical check-up. He received a clean bill of health. But the chest pain continued. He kept thinking of the death of his friend. Jack thought about how much his friend missed in life and he saw how hard it was for his friend's family to manage after he passed away.
Jack realized that he didn't want to end up his life that way. He talked his feelings over with his wife and children, and decided to change his way of life. The family moved to a small town where he started a simple life. Now he is running a small art gallery(画廊). He is relaxed, and says he has never been so happy in his life, and he has got no more chest pain.
63. Your close friend's death is __________________ to you.
A. a warning B. common C. a direction of life D. an example
64. The underlined sentence in the third paragraph means "________________".
A. The doctor didn't write a word on his bill
B. The doctor didn't want Jack to pay for the bill
C. The doctor didn't find anything wrong with him
D. The doctor didn't want to treat his pain
65. His friend's death made Jack ________________.
A. lose much interest in life
B. realize that he missed the friend very much
C. doubt his way of life
D. ill for some time
66. While living in the small town Jack ________________.
A. earns less money B. gets more time
C. has a happier life D. does all these mentioned above
Stephen William Hawking was born on January 8th, 1942 in Oxford, England. His parents’ house was in North London, but during the Second World War Oxford was considered a safer place to have babies. When he was eight, his family moved to St Albans. At eleven Stephen went to St. Albans School, and then on to University College, Oxford, his father’s old college. Stephen wanted to do math, although his father would have preferred medicine. Math was not available at University College, so he did physics instead.
Stephen then went on to Cambridge to do research in Cosmology (宇宙论). After gaining his Ph.D. (哲学博士)he became first a Research Fellow, and later on a Professorial Fellow at Gonville and Caius College. After leaving the Institute of Astronomy in 1973, Stephen came to the Department of Applied Math and Theoretical Physics (理论物理), and since 1979 has held the post of Lucasian Professor of math.
Stephen Hawking has worked on the basic laws which rule the universe. With Roger Penrose he showed that Einstein’s General Theory of Relativity implied space and time would have a beginning in the Big Bang and an end in black holes. These results show it was necessary to unify(统一)General Relativity with Quantum Theory (量子论). One result of such a unification that he discovered was that black holes should not be completely black, but should give off radiation and disappear in the end.
59. Which of the following is NOT suitable for describing Stephen Hawking?
A. He once studied at the same college that his father studied at.
B. At one time he did research in Cosmology in Oxford.
C. He preferred math to medicine at college.
D. He contributed to the unification of General Theory of Relativity and Quantum Theory.
60. The underlined word “available” in the first paragraph probably means “________”.
A. able to be had B. allowed to study
C. easy to understand D. limited to learn
61. Why did Stephen Hawking’s parents move to Oxford from North London?
A. Because they liked it better than North London.
B. Because there was a world-famous university there.
C. Because they were tired of living in North London.
D. Because it was safer to give birth to a baby in Oxford.
62. Which of the following would be the best title for the passage?
A. Einstein and Stephen Hawking
B. Big Bang, a great theory
C. Stephen Hawking, a great British scientist
D. The unification of two theories
OTTAWA — Canada’s western city of Calgary is the world’s best city when it comes to healthy living, local press reported Monday.
According to an international survey by Mercer Human Resource Consulting, a London-based consulting firm, Calgary was put at the top of a list of 144 cities. It scored 121 points, just above Honolulu’s score of 120. Helsinki(赫尔辛基,芬兰首都) and Ottawa followed at 119.5 and 118.5 respectively.
Three other Canadian cities came in the top 20. Montreal and Vancouver tied for ninth and Toronto came in at 18th.
The scores are based on air pollution levels, availability and quality of hospitals and medical supplies, as well as the efficiency of waste removal and sewage systems.
In America, the lowest scoring city was Atlanta, which was ranked 76th. Athens was the lowest scoring city in Western Europe, ranking 120th because of its air pollution. London was ranked 59th.
56. How many Canadian cities are in the top 20?
A. 3.B. 4. C. 5. D. 6.
57. Which of the following is NOT taken into account when the cities were scored?
A. Weather conditions. B. Air quality.
C. Waste removal.D. Medical supplies.
58. Among the following cities, which is the lowest scoring one?
A. Atlanta. B. Athens. C. London. D. Helsinki.
Parents often believe that they have a good relationship with their teenagers (青少年). But last summer, Joanna and Henry noticed a change in their older son: suddenly he seemed to be talking far more to his friends than to his parents. “ The door to his room is always shut.” Joanna noted.
Tina and Mark noticed similar changes in their 14-year-old daughter. “She used to cuddle up (蜷伏) with me on the sofa and talk ,” said Mark . “Now we joke that she does this only when she wants something, Sometimes she wants to be treated like a little girl and sometimes like a young lady. The problem is figuring out which time is which.”
Before age 11, children like to tell their parents what’s on their minds. “In fact, parents are first on the list.” said Michael Riera, author of Uncommon Sense for Parents with Teenagers. “This completely changes during the teen years.” Riera explained. “They talk to their friends first, then maybe their teachers, and their parents last.”
Parents who know what’s going on in their teenagers’ lives are in the best position to help them. To break down the wall of silence, parents should create chances to understand what their children want to say, and try to find ways to talk and write to them. And they must give their children a mental break, for children also need freedom, though young. Another thing parents should remember is that to be a friend, not a manager, with their children is a better way to know them.
72.“The door to his room is always shut” suggests that the son______________.
A.is always busy with his studies
B.doesn’t want to be disturbed
C.keeps himself away from his parents
D.begins to dislike his parents
73. What troubles Tina and Mark most is that _____________.
A.their daughter isn’t as lovely as before
B.they can’t read their daughter’s mind exactly
C.they don’t know what to say to their daughter
D.their daughter talks with them only when she needs help
74.Which of the following best explains “ the wall of silence” in the last paragraph?
A.Teenagers talk a lot with their friends.
B.Teenagers do not want to understand their parents.
C.Teenagers do not talk much with their parents.
D.Teenagers talk little about their own lives.
75.What can be learned from the passage?
A.Parents are unhappy with their growing children.
B.Parents have suitable ways to talk with their teenagers.
C.Parents should be patient with their silent teenagers.
D.Parents should try to understand their teenagers.