You could fill a store with all the energy drinks available. They promise to make people feel more energetic and think more clearly. These products have names like Red Bull, Monster, Ripped Force, Speed Stack and 5-Hour Energy. They appeal mainly to young people.
Professor Chad Reissig, at Johns Hopkins University in Baltimore, is a medical researcher who studies drug dependence. He says the team he works on got interested in studying energy drinks.
He says the researchers have found three things. One: there are hundreds of brands of energy drinks in most major countries. Two: the drinks are not clearly labeled with enough information. And three: the amount of caffeine differs greatly. Some contain as little as fifty milligrams, while others as much as five hundred.
Some people combine energy drinks with alcohol. They think they can drink more alcohol that way and not be affected. Studies, however, suggest that they are still under the influence of the alcohol even if they do not feel that way.
Some makers of energy drinks do provide warnings. For example, a popular energy drink warns against use by people who are under the age of twelve. The directions also advise people to limit caffeine products and to drink only half the bottle.
The team at Johns Hopkins University published a report in the journal Drug and Alcohol Dependence. They suggested that the amount of caffeine and other ingredients be clearly listed on the drink. The researchers are continuing to study energy drinks. They are seeking young people who have had a bad experience after drinking them.
50. According to the passage, the energy drinks mainly attract____.
A. young people B. alcohol drinkers
C. university professors D. twelve-year-old children
51. The team thinks that the biggest problem of the energy drinks is that .
A. there are too many brands B. they are not clearly labeled
C. there is too much caffeine D. they are not available in some stores
52. The purpose of the passage is to tell readers .
A. to identify caffeine in energy drinks
B. to take a closer look at energy drinks
C. whether energy drinks are good or bad
D. whether energy drinks make people addicted
"The noise made by boats of whale-watching tourists may be causing communication problems for the animals," British researchers said last week.
Whale watching is a popular tourist activity in places where groups of killer whales (虎鲸) live. Every day, dozens of boats filled with tourists go to watch the beautiful animal. Unfortunately, the engines of the boats make a lot of noise, and that may be causing problems for the whales, according to a report in the US science magazine Nature .
The whales travel in groups, and communicate with each other through sonic (声波的) calls that some scientists refer to as singing. The sounds of the boat engines may be creating too much background noise for the whales to be able to hear each other.
The researchers listened to recordings of whale calls made between 15 and 25 years ago, before whale-watching became popular. These were compared to more recent recordings.
They found that the animals have started to sing for longer than they used to, like a person shouting to a friend across a noisy room.
It is believed that the whales are trying to communicate hunting or breeding(繁殖) information. Scientists said that, "if this is prevented, the future of the world's whale population could be in danger."
"Animals became slow in mind and repeat themselves in noisy areas," said Volker Deecke, a Canadian biologist. "They have to say things twice or three times in order to be understood.”
The killer whales studied were living off the coast of northwestern America. The number of killer whales in this area has been falling for several years, but scientists are not sure why.The passage mainly tells us______.
| A．The problems of whale-watching |
| B．how killer whales communicate with each other |
| C．the reduced population of killer whales caused by whale-watching |
| D．hearing problems of the killer whales caused by whale watching. |
Now in a noisy background, the killer whales have to__________.
| A．sing in a louder voice |
| B．sing longer |
| C．travel in smaller groups |
| D．get nearer to each other |
Scientists believe that killer whales sing to_______.
| A．warn each other of dangers |
| B．keep in the same group |
| C．send useful information |
| D．enjoy themselves |
From the passage, we can feel that the author is_______.
| A．angry |
| B．hopeful |
| C．worried |
| D．disappointed |
Which of the following is the possible result of whale-watching?
| A．Fewer fish in the ocean. |
| B．Misunderstanding between the whales. |
| C．Reduced number of the whales in the area. |
| D．Serious water pollution along the coast. |
Jacqueline Bouvier Rennedy OnassIis was one of the most private women in the world, yet when she went to work as an editor in the last two decades of her life, she revealed(展现) herself as she did nowhere else.
After the death of her second husband, Greek shipping magnate (巨头 ) Aristotle Onassis, Jacqueline's close friend and former While House social secretary Letitia Baldrige made a suggestion that she consider a career(职业) in publishing. After consideration, Jacqueline accepted it. Perhaps she hoped to find there some ideas about how to live her own life .She became not less but more interested in reading. For the last 20 years of her life, Jacqueline worked as a publisher's editor, first at Viking, then at Doubleday, pursuing (迫求 ) a late-life career longer than her two marriages combined. During her time in publishing, she was responsible for managing and editing more than 100 successfully marketed books. Among the first books were in the Russian Style and Inventive Paris Clothes. She also succeeded in persuading TV hosts Bill Moyers and Joseph Campbell to transform their popular television conversations into a book, The Power of Myth. The book went on to become an international best-seller. She dealt, too, with Michael Jackson as he prepared his autobiography(自传)，Moonwalk.
Jacqueline may have been hired for her name and for her social relations , but she soon proved her worth. Her choices, suggestions and widespread social relations were of benefit both to the publishing firms and to Jacqueline herself. In the books she selected for publication, she built on a lifetime of spending time by herself as a reader and left a record of the growth of her mind. Her books are the autobiography she never wrote, Her role as First Lady, in the end, was overshadowed by her performance as an editor. However, few knew that she had achieved so much. We can learn from the passage that Jacqueline________.
| A．became fond of reading after working as an editor |
| B．was in charge of publishing 100 books |
| C．promoted her books through social relations |
| D．gained a lot from her career as an editor |
The underlined sentence in the last paragraph probably means that______.
| A．Jacqueline ended up as an editor rather than as First Lady |
| B．Jacqueline’s life as First Lady was more colorful than as an editor |
| C．Jacqueline was more successful as an editor than as First Lady |
| D．Jacqueline’s role as First Lady was more brilliant than as an editor |
What can be inferred from the passage?
| A．Jacqueline’s two marriages lasted more than 20 years |
| B．Jacqueline’s own publishing firm was set up eventually |
| C．Jacqueline’s view and beliefs were reflected in the books she editor. |
| D．Jacqueline’s achievements were widely known |
The passage is mainly______.
| A．an introduction of Jacqueline’s life both as First Lady and as an editor |
| B．a brief description of Jacqueline’s lifelong experiences |
| C．a brief account of Jacqueline’s career as an editor in her last 20 years |
| D．an analysis of Jacqueline’s social relations in publishing |
A mother from Colorado who doctors said had died while giving birth to her son, has said it is a Christmas miracle that both she and the boy are alive.
Tracey Hermanstorfer’s heart stopped beating and her son Coltyn appeared lifeless after the Caesarean (剖腹产) section on Christmas Eve. However, a few minutes after he was born, both began breathing again. Dr. Stephanie Martin told Good Morning America she could not explain how the pair survived. Mrs. Hermanstorfer and her husband Mike told the American television show that they were doing “good” following the drama at Colorado Springs Memorial Hospital.
The couple, who already had two children, had to go into the hospital seven weeks earlier than planned. Her husband, 37, said his wife was tired after receiving an epidural (硬膜外麻醉) during the labor (分娩) but after closing her eyes, she “wasn’t waking up”. She stopped breathing and she is believed to have suffered a heart attack before her heart stopped beating entirely.
Dr. Martin said she was called in and that the outlook was grim since in most situations like this, “despite the best efforts of the team”, the mother was often unable to be revived. In that case doctors then tried to focus on delivering the baby but when he was born he was “completely lifeless”.
Mr. Hermanstorfer told the Associated Press news agency,“I had everything in the world taken from me, and in an hour and a half I had everything given to me.”
Dr. Martin said she did not have a “great explanation” for why Mr. Hermanstorfer’s heartbeat returned. “Somewhere between four and five minutes she had been without heart rate and had stopped breathing a minute or two prior to her heart stopping,” she said. The doctors were then able to bring the baby back to life, and the mother was alive after that.
Despite tests, she said doctors were still not sure about what had happened. However Mrs. Hermanstorfer and her husband Mike have said they believed it was down to a miracle. She said:“I got a second chance in life.” The story happened on_______.
| A．December, 24 |
| B．December, 25 |
| C．December, 31 |
| D．January, l |
What might have happened to Tracey Hermanstorfer just before her heart stopped beating?
| A．She became unconscious. |
| B．She took a nap. |
| C．She had a bad headache. |
| D．She suffered a heart attack. |
Which of the following is the correct order of what happened to Tracey Hermansrorfer?
a. suffering a heart attack
b. stopping heart beating entirely
c. stopping breathing
d. coming back to life
e. receiving an epidural
f. producing a baby
| A．acfdbe |
| B．fcadbe |
| C．eacbfd |
| D．eabcfd |
What feelings did Mr. Hermanstorfer have during the incident?
| A．Sad and delighted. |
| B．Disappointed and depressed. |
| C．Sad and angry. |
| D．Touched and regrettable. |
Which of the following words best expresses Dr. Martin's attitude towards Tracey Hermanstorfer's coming back to life?
| A．Shocked. |
| B．Puzzled. |
| C．Normal. |
| D．Curious. |
If Confucius(孔子) were still alive today and could celebrate his September 28 birthday with a big cake, there would be a lot of candles. He’d need a fan or a strong wind to help him put them out.
While many people in China will remember Confucius on his special day, few people in the United States will give him a passing thought. It’s nothing personal. Most Americans don’t even remember the birthdays of their own national heroes.
But this doesn’t mean that Americans don’t care about Confucius. In many ways he has become a bridge the foreigners must cross if they want to reach a deeper understanding of China.
In the past two decades, the Chinese studies programs have gained huge popularity in Western universities. More recently, the Chinese government has set up Confucius Institutes in more than 80 countries. These schools teach both Chinese language and culture. The main courses of Chinese culture usually included Chinese art, history and philosophy(哲学). Some social scientists suggest that Westerners should take advantage of the ancient Chinese wisdom to make up for the drawbacks of Western philosophy. Students in the United States, at the same time, are racing to learn Chinese. So they will be ready for life in a world where China is an equal power with the United States. Businessmen who hope to make money in China are reading books about Confucius to understand their Chinese customers.
So the old thinker’s ideas are still alive and well.
Today China attracts the West more than ever, and it will need more teachers to introduce Confucius and Chinese culture to the West.
As for the old thinker, he will not soon be forgotten by people in the West, even if his birthday is.The opening paragraph is mainly intended to_______.
| A．provide some key facts about Confucius |
| B．attract the readers’ interest in the subject |
| C．show great respect for the ancient thinker |
| D．prove the popularity of modern birthday celebrations |
We can learn from Paragraph 4 that American students_______
| A．have a great interest in studying Chinese |
| B．taken an active part in Chinese competitions |
| C．try to get high scores in Chinese exams |
| D．fight for a chance to learn Chinese |
What is the best title for the passage?
| A．Forgotten Wisdom in America |
| B．Huge Fans of the Chinese Language |
| C．Chinese Culture for Westerners |
| D．Old Thinker with a Big Future |
The passage is likely to appear in_______.
| A．a biography |
| B．a history paper |
| C．a newspaper |
| D．a philosophy textbook |
Astronauts on shorter shuttle missions (使命) often work very long days. Tasks are scheduled so tightly that break times are often used to finish the tightly that break times are often used to finish the day’s work. This type of scheduled is far too demanding for long missions on the International Space Station (ISS). ISS crewmembers usually live in space for at least a quarter of a year. They work five days on and two days off to mimic the normal way they do things on Earth as much as possible. Weekends give the crew valuable time to rest and do a few hours of housework. They can communicate with family and friends by email, internet phone and through private video conferences.
While astronauts cannot go to a baseball game or a movie in orbit, there are many familiar activities that they can still enjoy. Before a mission, the family and friends of each ISS crewmember put together a collection of family photos, messages, videos and reading material for the astronauts to look at when they will be floating 370 kilometers above the Earth.
During their mission, the crew also receives care packages with CDs, books, magazines, photos and letters. And as from early 2010, the internet became available on the ISS, giving astronauts the chance to do some “web surfing(冲浪)”in their personal time. Besides relaxing with these more common entertainments, astronauts can simply enjoy the experience of living in space.
Many astronauts say that one of the most relaxing things to do in space is to look out the window and stare at the universe and the Earth. Both the shuttle and the ISS circle the planet several times each day, and every moment offers a new view of the Earth’s vast land mass and oceans.What does the word “mimic” in Paragraph 1 probably mean?
| A．Find |
| B．Copy |
| C．Change |
| D．Lose |
Which of the following best describes the families of the astronauts on the ISS?
| A．They are caring and thoughtful. |
| B．They are worried and annoyed. |
| C．They are impatient and annoyed. |
| D．They are excited and curious. |
In the final paragraph, the author shows that astronauts______.
| A．get more pleasure in space than on the Earth. |
| B．finding living in space a bit boring and tiring |
| C．regard space life as common |
| D．love to see the Earth from space |
The passage mainly discusses how astronauts_______.
| A．work for longer missions in space |
| B．connect with people on the Earth |
| C．observe with Earth from space |
| D．spend their free time in space |