Texting is a great way to communicate and teenagers are doing just that. New research shows that on average, teens are sending 2,000 text messages a month, and doctors say it’s causing injuries.
13-year-old Bailey Baker keeps using her thumbs, sending text messages to her friends again and again. The past March may have been her best month ever, texting 8,000 times. Now, she says she’s feeling the pain. “Just mainly back and neck problems and thumb numbness,” she says.
Baylor-Garland Dr. Jane Sadler is seeing more and more teens who simply text until it hurts. She says parents, including Bailey’s mom, have no idea how much their kids are texting. “I was thinking she was texting about 25 texts a day,” says Lisa Baker. “Wrong! We’ve uncovered a problem.” It didn’t take Dr. Sadler long to find the problem. She gave Bailey the once-over and learnt that Bailey had developed Texting Teen Tendinitis(肌腱炎)
“A lot of them report pain in their thumbs, back and neck,” says Dr. Sadler. “When we look into it and examine a little bit further, we see texting is the main cause of the problem.” Dr. Sadler says back pain is caused by poor posture while texting. Bailey often texts for up to 2 hours a day; that’s a lot of wear and tear on the thumbs which over time, can break down. Dr. Sadler tells over-texting teens to look into the future. “What I tell them is ‘Hey, you might be normal now, but when you are 40 or 50, you can get arthritis (关节炎).’”
Dr. Sadler recommends limiting texting to 50 a day, and keeping good posture. Dr. Sadler also says touch screens are easier on the thumbs than keyboards and hand exercises are great to build up those muscles, making it easier to text.
68．Because of texting, Bailey Baker suffers from the following problems EXCEPT ______.
A．back pain B．neck pain C. headache D．thumb numbness
69．What does the underlined part in Paragraph 3 mean?
A．She gave Bailey Baker a quick examination.
B．She solved Bailey Baker’s problem at once.
C. She gave Bailey Baker a piece of advice.
D．She let Bailey Baker send a text message again.
70．What can we conclude from Paragraph 4?
A．Teenagers won’t get hurt if they stop texting right now.
B．Poor posture while texting is the main cause of injuries.
C. Thumbs won’t ache if teens text for no more than 2 hours a day.
D．Over-texting may have a bad effect on people in the near future.
Like a backward tape, time returns to my mom's teens．She is waiting for admission results from a famous high school．She has studied for the test but with joy, since she feels no suffering in learning．Suddenly I spy her jumping and laughing, waving a paper in her hand while her family stands nearby, more shocked than happy．No one else from their village has ever passed the test．
Later, at her new high school, I proudly watch as she continues to rise to the top．Many of her essays are published in newspapers, and her classmates seek her advice when a test is approaching． She never refuses them, and I feel honored to be related to such an intelligent person．
As I walk with her through her journey, I finally come to the point I have been looking forward to most: her life in America． After passing several tests and finding a kind boss to sponsor her, she becomes a college student at University of California, Los Angeles． At first, I sense her loneliness and panic as she tries to adapt to her new surroundings．Though her English is broken and she knows little about American culture, I can tell she is more than grateful to be here． Here she has access to electricity and running water, and most importantly, better schools． At UCLA, she has so many opportunities to grow and advance in her field．
Her journey to America was for just one reason: education．Though having an education will better her life, I know she doesn't do it for herself．My mom wants her children to have an easier life that will not require hard labor．I see what my mom goes through, and I'm filled with gratitude that she has made the brave choice to move here．According to the first paragraph, the writer's mother considers learning to be.
| A．easy and joyful | B．bitter but rewarding |
| C．costly and boring | D．exciting but fruitless |
Which of the following does the writer's mother do at high school?
| A．Working as a newspaper deliverer． |
| B．Feeling proud of her intelligence． |
| C．Working hard to be honored and awarded． |
| D．Giving her classmates advice before tests． |
How does the writer's mother pay for her college education?
| A．By doing a part-time job． |
| B．By asking her parents for support． |
| C．With the financial support from a kind boss． |
| D．With the help from her teachers and classmates． |
What is the final aim of the writer's mother's going to America?
| A．To accumulate wealth． |
| B．To benefit her children． |
| C．To make her parents live better． |
| D．To become famous in her field of study． |
Which of the four books above was published the latest?
| A．The Help． | B．The Hunger Games． |
| C．Publication Manual． | D．Diary o f a Wimpy Kid． |
Suzanne Collins' book was published by．
| A．Berkley Trade |
| B．Amer Psychological Assn |
| C．Scholastic Press |
| D．Amulet Books |
What is the list price of Josie Wags' book?
| A．$9. | B．$14 | C．$16 | D．$28 |
Which of the four books have something to do with science?
| A．The Hunger Games and Publication Manual． |
| B．The Hunger Games and Diary of a Wimpy Kid ． |
| C．The Help and Publication Manual． |
| D．The Help and Diary of a Wimpy Kid． |
People in several American states may be surprised to see cars on city streets without a driver. Experimental driverless vehicles now are legal in Florida, Nevada and California. They are pointing the way to a future that is not far down the road. The high-tech company Google has a number of self-driving cars, which had covered 480,000 kilometers by August. Volvo is among the companies doing road tests and says it plans to sell driverless cars by 2020.
In September, California Governor Jerry Brown signed an act to allow autonomous vehicles on the roads of his state. " Today we're looking at science fiction becoming tomorrow's reality-the driverless car. " The technology for these cars includes cameras, radar and motion sensors. The systems have been improved through competitions sponsored by the U. S. government agency DARPA. Engineer Richard Mason of the Rand Corporation helped design driverless vehicles for DARPA challenge races.
Cars have become much more fuel-efficient, and new electronic features are' making Hondas safer, said Angie Nucci of Honda America. " A camera on the passenger-side mirror actually engaged on your guiding screen so you can safely change lanes. " Other safety features include warning systems on the front and the sides of the cars. These systems help drivers , but don't replace them. Curator Leslie Kendall of the Petersen Automotive Museum said autonomous cars will make the high ways safer．
"By taking out drivers, you also remove most risks of an accident," Kendall said. He said consumers, however, may be unwilling to lose control. "It may take them time to come to realize that the technology is indeed reliable, but it will have to prove itself first. "
Mason said the technology already works and the biggest challenge now is getting down the cost for driverless vehicles from hundreds of thousands of dollars to something more affordable. He said this will happen as the technology is improved.What can we learn from Paragraph l?
A. Driverless vehicles are now legal in the whole USA.
B. Volvo will be the first to sell driverless cars.
C. Driverless cars are pointing us' a faraway future.
D. Google's self-driving cars have covered a long distance.We learn that Governor of California Jerry Brown_________.
| A．helped design self-driving cars. |
| B．supports self-driving cars on roads. |
| C．considers self-driving cars science fiction. |
| D．improved the self-driving car systems. |
What is the role of the systems mentioned in Paragraph 3?
| A．They can help people drive more safely. |
| B．They can take the place of drivers now. |
| C．They can make cars run without fuel. |
| D．They can help cars run much faster. |
According to Richard Mason, what is the biggest challenge for driverless cars?
| A．They are not allowed to run on the road. |
| B．Their technical problems remain to be solved. |
| C．They are now too expensive for consumers. |
| D．They are more dangerous for people on the street. |
What's the best title of the passage?
| A．The benefits of the self-driving cars. |
| B．The biggest challenge of the self-driving cars. |
| C．Safer or more dangerous-self-driving cars. |
| D．Self-driving cars-science fiction future is near. |
Students from Florida International University in. Miami walked on water Thursday for a class assignment. To do it, they wore aquatic (水上的)shoes they designed and created.
Alex Quinones was the first to make it to the other side of a 175-foot lake on campus in record time - just over a minute. Quinones, who wore oversized boat-like shoes, also won last year and will receive $ 500. Students had to wear the aquatic shoes and make it across the lake in order to earn an '6A" on the assignment for Architecture Professor Jaime Canaves, Materials and Methods Construction Class. "It's traditional in a school of architecture to do boats out of cardboard for a boat race. I thought our students were a little bit more special than that, " Canaves said. "We decided to do the walk on water event to take it to the next level. "
A total of 79 students competed in the race this year in 41 teams. Only 10 teams failed to cross the lake. Others who fell got back up and made it to the end. The race is open to all students and anyone in the community. The youngest person to ever participate was a 9-year-old girl who competed in place of her mother, while the oldest was a 67-year-old female.
A large crowd on campus joined Canaves as he cheered on the racers. He shouted encouraging words, but also laughed as some unsteadily made their way to the end.
"A part of this is for them to have more understanding of designing and make it work better, " he said. It is also a lesson in life for the students.
"Anything, including walking on water, is possible, if you do the research,test it and go through the design process seriously.Which statement about Alex 'Quinones is ture ?
| A．He finished the race in less than a minute. |
| B．He won the race with the help of 2 boats. |
| C．He failed the race last year. |
| D．He set a new record this year. |
For what purpose did the students take part in the race?
| A．To go across the lake to school. |
| B．To test their balance on the water. |
| C．To pass Professor Canaves’ class. |
| D．To win the prize money of $ 500. |
Which of the following is true about the race?
| A．The students who fell into the water had to quit. |
| B．More than 20 teams failed to cross the lake. |
| C．The students kept silent when the other racers competed. |
| D．The youngest competitor competed instead of her mother. |
According to Canaves, this race can help the students
| A．understand designing better | B．achieve almost everything |
| C．work together and unite as one | D．walk on the surface of water |
What is the purpose of this passage?
| A．To advertise a student' s program. |
| B．To report an interesting assignment. |
| C．To introduce a creative professor. |
| D．To encourage special events on campus. |
The World Health Organization says there has been a sharp increase in the number of over-weight children in developing countries. In African countries, the WHO says the number of over-weight or obese children is twice as high as it was 20 years ago. Around the world, about 43 million children under the age of five were overweight in 2013.
Overweight and obese children are more likely to become overweight and obese adults. The condition can generate serious health problems like heart diseases.
Francesco Branca is the director of the WHO Department of Nutrition for Health and Development. He says urban lifestyle makes people eat processed food more often ,which has a high sugar ,fat and salt content. He also says people are gaining weight because of their lack of activities. They travel in cars or other vehicles more than on foot.
The WHO experts say to lower obesity rates is especially complex in countries that also deal with high rates of infectious(感染性的) diseases.
The WHO has some basic solutions for individuals and countries. The organization says you should lower your intake of fat, sugar, salt and processed food and eat more fruits,' vegetables and increase physical activity. The WHO says these actions are especially important for children.
And WHO expert Branca says mothers should breastfeed their babies for at least the first six months of life, if possible. More importantly, governments should consider providing vitamins for children and educational campaigns about problems linked to obesity would also help. In his view, government policies should deal with how food is marketed to children and food producers must balance quality and taste with the dangers of sugar, fat and salt. "Reducing the number of overweight children will not be easy. The goal is difficult to meet even in wealthy countries. " he adds.What is the main idea of Paragraph l?
| A．Children in developing countries generally weigh too much. |
| B．Overweight children in developing countries have increased greatly. |
| C．The number of overweight children in the world has doubled. |
| D．The World Health Organization has increased greatly. |
According to Branca , people are becoming overweight because of their changes in _______
| A．lifestyles | B．transportation |
| C．physical condition | D．school educational . |
Which of the following word can best replace the underlined word in Paragraph 2?
| A．cure | B．prevent | C．worsen | D．cause |
According to WHO, which of the following is true?
| A．Poor nutrition is often related to children obesity. |
| B．To lower infectious disease rates is more complex than to lower obesity rates. |
| C．Eating less sugar and more vegetables helps lower obesity rates. |
| D．Increasing physical activity is most effective to lower obesity rates. |
What can we learn from the last Paragraph?
| A．Babies breastfed aren't likely to become overweight. |
| B．Governments should play a necessary role in fighting obesity. |
| C．Food producers should be stopped from marketing, food to children. |
| D．The number of overweight children decreases easily in wealthy countries. |