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　　For most of us, dieting is a frustrating fact of life. With so much conflicting nutritional information about, it can be difficult to tell which weight-loss strategies really work. Let' s start by discounting these confusing myths.

　　1. All calories are created equal

　　What you eat, not how much, is the main factor behind weight gain, according to research.Calories from fat pack on the pounds. The reason: during digestion, the body burns many more calories metabolizing protein and carbohydrates than it does metabolizing fat.

　　2. Desserts are taboo

　　Cakes, pies and ice cream can sensibly be worked into a diet, the expert says. Moderation is the key. CVt down on other meals if you'll be eating out at a restaurant known for its rich sweets.Or indulge, but take only a few bites.

　　3. Fast foods are forbidden

　　A plain hamburger on a bun is still a healthful choice. So is grilled chicken or a green salad with low-cal dressing. But watch out for French fries, milkshakes and batter-dipped chicken or fish.

　　4. Fasting is the fastest diet

　　Some studies suggest that drastically reducing calorie intake switches the body into a " starvation

　　mode", which conserves calories and decreases your metabolic rate. The more frequently you deprive yourself of food, the better your body may get at storing calories. So, in the long run, repeated fasting may actually undermine your weight-loss efforts.

　　5. To keep weight off, simply watch what you eat .

　　According to experts, exercise combined with dieting ensures weight Joss better than dieting alone does. Experts also agree that sticking with regular, moderate exercise is more important that occasional vigorous workouts are. Obesity-researcher Kelly Brownell encourages patients to make a series of small physical efforts: taking the stairs instead of the elevator and parking the car far from where you are going and walking.

　　Most important, before getting caught up in dietary myths, let good sense shape your eating habits. Your body will thank you for it.

　　51. It cannot be inferred from the first paragraph that _ .

　　[A] the information about dieting is always- contradictory

　　[B] there are too many weight-loss strategies to choose from

　　[C] dieting is always troublesome to most people

　　[D] people should not believe the ideas of dieting

　　52. One of the elements to gain weight is _ .

　　[A] the amount of the food you eat

　　[B] over sleeping

　　[C] laziness

　　[D] the kind of food you eat

　　53. Which of the following saying is true about dieting?

　　[A] You can't eat sweets.

　　[B] Fast foods are not good.

　　[C] You should not neglect any meals.

　　[D] Fasting is always helpful

54. The phrase "starvation mode" means .

　　[A] being very hungry

　　[B] eating what you like when you are hungry

　　[C] weight-loss efforts

　　[D] being ready to eat

　　55. The word "shape" in the last sentence means .

　　[A] break [B] form

　　[C] get rid of [D] change