*Question*
Doctors say obesity,also known as severe overweight,is a complex condition.A doctor may advise medical interventions  in addition to changes in behavior.But experts say the more successful weightloss plans include a wellbalanced diet and exercise. People who want to avoid weight gain have to balance the number of calories they eat with the number of calories they use.To lose weight,you can reduce the number of calories you take in,or increase the number you use,or both.Experts at the National Institutes of Health say to lose weight,a person should do some moderate or intensive physical exercise most days of the week.This could include fast walking,sports or strength training. A recent study looked at four of the most popular dieting plans in the United States.Researchers at Stanford University studied more than three hundred overweight women,mostly in their thirties or forties.Each woman went on one of the four plans:Atkins,The Zone,Ornish or LEARN.The women attended diet classes and received written information about the food plans.At the end of a year,the women on the Atkins diet had lost the most,more than four and a half kilograms on average. Christopher Gardner led the study,reported in the Journal of the American Medical Association. He said the Atkins diet may be more successful because of its simple message to lower the intake of sugar.Also,he said the advice to increase protein in the diet leads to more satisfying meals. But last week,another report suggested that only a small minority of people have longterm success in dieting.Researchers at the University of California found that most dieters regained their lost weight within five years.And often they gained back even more.But those who kept the weight off generally were the ones who exercised. All the following is helpful to lose weight EXCEPT  _  . A) a healthy diet B) physical exercise C) medical interventions D) being polite to others
**Answer**
D

*Question*
The Happiest Cities On Earth If you're looking for a cheery destination for your next vacation, consider these four spots and get ready to take notes on how to really live the good life. Singapore With one of the highest population densities in the world and residents known for being workaholics, it's hard to imagine the city-state of Singapore having one of the happiest populations on earth. And yet in a recent survey, 95% of them said they were either very happy or quite happy. They give their city high marks for cleanliness and safety--subways are pristine   and unfailingly arrive on time, and police are seen as helpful and good at their jobs. What's more, they feel they can count on their neighbours--all 5.1 million of them. Arhus, Denmark The residents of Arhus cheerfully part with 68% of their income in taxes, knowing that in return they will be guaranteed free healthcare, free daycare, and a top-notch   education for their children. An energetic city of 300,000 with a lively cultural scene and a diverse number of religions represented, _ (the range in incomes is narrow), as well as easy access to the nearby sea and surrounding countryside, make Arhus seem more like a small town. San Luis Obispo, CA According to a 2008 Gallup-Healthways study, people who live in San Luis Obispo are more likely than residents of other U.S. cities to smile and experience joy and are less likely to experience pain or depression. About 64,000 of the 260,000 people in the greater metropolitan area  , located halfway between Los Angeles and San Francisco, volunteer at over 11,000 non-profit organizations. Few journeys to work are longer than 10 minutes (one reason its members rank in the upper third for job satisfaction), so "it's easy to be involved," resident Pierre Rademaker said. Business signs are unobtrusive   by law, fewer than 11% of residents smoke--the lower rate in the U.S.--there are lots of bike lanes, and the city's plaza draws crowds of people for free concerts on summer Fridays. What's not to love? Monterrey,... According to the passage which of the following statements is NOT TRUE? A) The people of Monterrey didn't enjoy political freedom until 2000. B) The residents in Singapore feel happy because of its low population density. C) The people of San Luis Obispo can enjoy free concerts in summer. D) Arhus is handy to the seaside and countryside.
**Answer**
B

*Question*
Sales of electric bicycles, or e-bikes, a hot item in consumer green tech, are expected to grow by more than 50% in North America during 2013. Actor William Shatner, who is no stranger to futuristic tech, recently purchased two e-bikes for him and his wife.  I've been shopping for an e-bike now for a few weeks, and I've had my eye on the folding electric bike. I've had folding bikes in the past and love the convenience of being able to throw my bike into my car. The e -bike market is ready to go mainstream in the U.S. The price for e-bikes has come down greatly in recent months. At one time, most e-bikes with good components and proper weight were in the $3,000range. Now you can find reasonable quality e-bikes in the $1,000range. With gas prices at all-time highs, e-bikes are an attractive, low-cost option to gas efficient vehicles. E-bike owners are finding that they are great for commuting to work, as  traditional bikes can be a problem with office dress and sweat. People who use e-bikes range from commuters to casual cyclers who like a little help with hills and wind,to those who decided to save money on buying a motor bike.These are not for the serious road cycler or professional mountain biker. If you're considering all e--bike, it pays to do some research first.Cheaper e-bikes are going to be heavier and have less battery--power.Higher priced bikes will be made from lighter materials and have better batteries. Another consideration is local motor vehicle laws.For example,according to US federal law,as long as your electric bike is under 750 watts and does not go over 20 MPH then it is a bicycle and not a motor vehicle.Most consumer e--bikes in the $1,000 range don't fit the motorized vehicle description. Which of the following about e--bikes is true? A) The cheaper e-bikes are usually made of lighter materials. B) Most e-bikes in the $l,000 range are a bicycle, not a motor vehicle. C) Local motor vehicle law doesn't have any limit to e-bikes. D) E-bikes in the $l,000 range are too cheap to have better batteries.
**Answer**

B