Cellphones, tablets, and computers are keeping children and teenagers awake at night-even when they' re not in use, according to new research. A study published on Monday in JAMA Pediatrics says that media devices are causing kids to sleep less and reducing the quality of sleep that they get. This leads to trouble of staying awake the next day.

Researchers analyzed hundreds of studies of children and teens aged 6-19. The scientists found a strong and consistent association between the use of technology at bedtime and poor sleeping. The reason is not just that kids are staying up too late with their devices. Using a computer can overstimulate the mind and emotions, the researchers say. A smartphone or tablet also gives off a light that affects the body's natural timing. These factors contribute to poor quality sleep. And many kids could be at risk. According to the study,72% of all children and 89% of adolescents have at least one device in their sleep environment. Most of these devices are used near bedtime.

"The harmful association between screen-based devices and kids' sleep is a major public health concern," the study concludes. In their conclusion, the researchers urge parents to understand the damaging influence of device use before sleep.

【小题1】What do the researchers disagree with?

A．Children even in dreams can be influenced by media devices.

B．Most adolescents like to play media devices before sleep.

C．Using media devices on bed makes kids sleep difficultly.

D．Using media devices can not excite the mind and emotions.

【小题2】How does a smartphone affect a child's sleep?

A．By making noises.

B．By giving off a light.

C．By attracting a kid's attention.

D．By sending out electronic waves.

【小题3】What can we learn from the second paragraph?

A．Media devices anytime put kids in danger.

B．Adolescents are more easily affected than children by phones.

C．Using technology at bedtime causes poor sleeping.

D．Media devices affect kid's performance at school.

【小题4】Whom does this article most probably writes to？

A．Scientists.	B．Parents.
C．Children.	D．Producers.

When Joshua Blue, a head teacher at the Kennedy, hosts a lecture for his students, he wears a light violet-colored tie. "You don't want so many bright colors that the kids will get distracted," said Blue. Colors give off very specific signals, and different tie colors stand for very different impacts. Wondering what color tie to wear to your next meeting? Here's how to choose the perfect color tie for every occasion:
All powerful reds
It's not a coincidence（巧合）that many politicians wear red-colored ties with light shirts and darker suits. "Red is the powerful color," said Mark Woodman, a trend analyst who studies color in Laurel, Maryland. "There’s something about red that always comes back to strength and passion.” But the tone of your reds matters, too. Darker reds can help build trust, while lighter red and pink ties can be more of a statement about your personal style and be associated with creativity. When you want to convey a sense of ambition, consider a shiny red.
Royal purples
Ross Znavor, an executive in financial services in New York, wears purple ties rather than red to business meetings because the color shows a bit of self-confidence and helps him create lasting first impressions. Purple, traditionally a sign of royalty and wealth is becoming more acceptable in the workplace.
Black affairs
"While you might not wear them to meetings on a regular basis, wearing black ties to a cocktail party or even a dinner is unique and attractive," said Zyla. But remember: the formal black color can feel aggressive in many situations. "Avoid it if you are a green-hand at work," Zyla said.
Right blues
Afraid of sending the wrong message with your tie color? Consider blue as the all-purpose tie. Blue ties are a good investment because the color reminds people of the sky and ocean. "Blue is the safest color to wear," Lindsay said.
【小题1】Why do many politicians prefer red-colored ties?

A．Because they often wear light shirts and darker suits.

B．Because they want to get promoted.

C．Because red is related to strength and passion.

D．Because red gets their message across easily.

【小题2】Who will probably choose the purple ties?

A．Politicians.	B．Businessmen.
C．Artists.	D．Head teachers.

【小题3】What color tie will you consider if you are a green-hand at work?

A．Red.	B．Purple.
C．Black.	D．Blue.

   According to a recent report, about 15% of the people in the UK are members of gyms. But are they more likely to be fit?

A study found that gym members were 14 times more active than people who didn’t belong to any health club. Gym members did six hours more exercise a week, and this activity did make them fitter than non-gym members. They also spent less time sitting down every day than non-gym members. The results were the same for men and women.

The study included 405 people between the ages of 30 and 64, and the main characteristics of those who were gym members were the same as those who were not. ''But gym members did more training than non-gym members, '' said the lead author, Elizabeth Schroeder of the University of Illinois.

While it might seem clear that gym members exercising more are healthier than non-members, Schroeder says this has not been directly shown before. However, the study is only designed to show a tie between gym membership and more exercise. It may be that active people like to join gyms. In the study, people who exercised as much as gym members were also in good health.

You can get the same benefits wherever you exercise. This study shows a gym membership can make you do more exercise, but other research shows that exercising outside has other help. Outdoor activities can make you feel happy about life—especially if you run through a forest.

Outdoor exercise is also more enjoyable than going to the gym. The first five minutes of outdoor exercise is especially helpful in making people feel good. But Schroeder says that a gym may also encourage greater exercise because it can be social and fun.

【小题1】What did the new study find out?

A．Gym members had healthier eating habits.

B．There were fewer women gym members than men.

C．Gym members did at least eight hours of exercise a week.

D．Gym members were more active than non-gym members.

【小题2】In the study, researchers studied ____________________.

A．some sports lovers

B．405 gym members

C．people from different age groups

D．30 gym members and 64 non-gym members

【小题3】Which of the following will Elizabeth Schroeder agree with?

A．Women should do more gym exercise.

B．We should be careful with outdoor training.

C．Outdoor exercise is better than gym exercise.

D．It is easier to keep exercising if you go to the gym.

   We all know the keys to living longer：eating healthily，exercising daily，and avoiding bad lifestyle habits，but do you know that practicing these simple steps when you’re 50 and older can add more years to your life？

According to a new research conducted by Harvard University scientists，adults who follow five healthy habits which include never smoking，maintaining a body mass index（BMI）（体重指数）below 30，exercising for at least 30 minutes a day，drinking alcohol only reasonably，and following a well-balanced diet，can add a decade or more to their lifespan.

The study，published in the American Heart Association’s journal Circulation，suggests that men over age 50 who follow these five lifestyle habits can add up to 12 years to their lives while women who follow these healthy habits can add 14 years to their lifespan. While the method of living a longer and healthier life hasn’t changed much over the years，this new information regarding the benefits of working out and eating healthily later in life is a bit of a breakthrough in terms of how we look at aging.

Modern medicine often treats the elderly with a more reactive approach，focusing on discovering and creating medicines and therapies to combat（防止）life-threatening illnesses like cancer and especially heart disease. According to scientists who conducted this study，the focus should be on preventative（预防的）measures，making sure aging adults are adapting healthy habits before they reach a stage in life when health issues normally arise.

It is very important to put prevention through diet and lifestyle changes first. Heart disease and cancer are the leading causes of death in the United States，while heart disease in particular can arise because of certain lifestyle habits. One of those habits is smoking，which scientists said was the biggest determining factor in a person’s lifespan. Researchers found that there was a direct connection between an adult’s risk of early death and his lifestyle habits，with those following all five of the healthy habits enjoying significantly longer lives.

【小题1】What is the question in the first paragraph intended to do?

A．To provide some advice for readers.

B．To predict the following paragraphs.

C．To introduce the topic of discussion.

D．To offer some background information.

【小题2】What is the most important in fighting against life-threatening illnesses?

A．Developing new therapies.

B．Discovering new medicines.

C．Applying effective prevention.

D．Following a well-balanced diet.

【小题3】Which of the following is the biggest threat to a person’s lifespan?

A．Smoking.	B．Lack of exercise.
C．Drinking heavily.	D．Unbalanced diets.

【小题4】What is the text mainly talking about?

A．A healthy lifestyle determines humans’health.

B．Healthy lifestyles help the older lengthen their lifespan.

C．How to live a healthy lifestyle.

D．Bad lifestyles increase people’s risk of early death.

Internet use appears to cause a decline in psychological well-being（安康）, according to research at Carnegie Mellon University.
Even people who spent just a few hours a week on the Internet experienced more depression and loneliness than those who logged on less frequently, the two-year study showed. And it wasn’t that people who were already feeling bad spent more time on the Internet, but that using the Net actually appeared to cause the bad feeling.
Researchers are puzzling over the results, which were completely contrary to their expectations. They expected that the net would prove socially healthier than television, since the Net allows users to choose their information and to communicate with others.
The fact that Internet use reduces time available for family and friends may account for the drop in well-being, researchers suggested. Faceless, bodiless “virtual”（虚拟的）communication may be less psychologically satisfying than actual conversation, and the relationship formed through it may be shallower. Another possibility is that exposure to the wider world via the Net makes users less satisfied with their lives.
“But it’s important to remember this is not about the technology  per se; it’s about how it is used,” says psychologist Christine Riley of Intel, one of the study’s sponsors. “It really points to the need for considering social effects in terms of how you design applications and services for technology.”
【小题1】The best title for this passage would be ________.

A．Internet may Cause Depression

B．The Dark Side of Internet

C．How to Use Technology Properly

D．The Importance of Psychological Well-being

【小题2】Internet use may cause a decline in psychological well-being because ________.

A．people who were already feeling bad spend more time on the Internet

B．Internet users thought the world was wider than it really was

C．people were too eager to turn the “virtual” communication into reality

D．people have less time for actual communication with their family and friends

【小题3】What does the underlined Latin word “per se” (in Para. 5) mean?

A．probably	B．absolutely
C．oneself	D．itself

【小题4】What’s the tone of the passage?

A．Optimistic.	B．Critical.
C．Objective.	D．Pessimistic.