Rats that eat high levels of a natural sugar known as fructose（果糖） seem to age faster than other rats--and the same could be true for people who eat too much sweet junk food, Israeli researchers said Monday.
　　Fructose, found naturally in honey and fruit, is used widely in foods ranging from soft drinks to yogurt（酸奶）. But while its sweet taste is popular, the sugar could cause wrinkles and health problems, the researchers said. Dr. Moshe Werman and Boaz Levi of the Technion-Israel Institute of Technology fed large amounts of fructose to laboratory rats. Writing in the Journal of Nutrition, they said the fructose-fed rats showed changes in the collagen（胶原蛋白）of their skin and bones.
　　Collagen, a fibrous protein found in connective tissue, bone and cartilage, basically holds the body together. The loss of collagen is what causes loose skin and deep wrinkles in older people.
　　The process affected, Werman's team said, is known as "cross linking". "Too much cross-linking reduces flexibility(弹性) and makes the skin stiff and rigid, and these are the conditions that encourage wrinkled skin," Werman said in a statement. He said the same could be true of people, although this has not been shown. "Americans are eating more and more processed foods, such as carbonated drinks, baked goods, canned fruits, jams and dairy products that contain fructose，than Asian people," Werman said. Other studies have shown that high fructose intake can affect how the body handles glucose and increases insulin resistance——which can both be important measures of the tendency toward diabetes(糖尿病).　　

The rats Werman worked with were fed much more than the average adult person might eat in a day, which is standard in such experiments. The rats were fed 12.5 grams of fructose per kg (2.2 pounds) of weight every day for a year. To compare, a person weighing 154 pounds (70kg) who drinks a quart (liter) of cola consumes about 60 grams of fructose, or 0.8 grams per kg of body weight.

60.If people eat too much fructose, they may have the following signs EXCEPT________.

A. loose skin     B. deep wrinkles     C. a sweet tooth      D. aging faster

61.According to the passage, diabetes is diagnosed (诊断) mainly by measuring________.

  A. the amount of fructose eaten         B. the loss of collagen

  C. the cross linking                  D. glucose and insulin resistance

62. What can we infer from the passage? ________

A. Americans are easier to have diabetes than Asians.

  B. Diabetes can only be controlled, not cured.

  C. People eating too much fructose must have health problems.

  D. It’s abnormal to feed more fructose to the rats than an adult in the experiment.

Every spring scores of people flock to the Buzzard Festival at Hinckley, Ohio. They come to watch for buzzards. Most would be glad just to take a look at a buzzard. If they do see one of these" flying garbage cans", it will probably be circling high in the sky. From there it can watch the ground for signs of the waste and the dead animals on which it feeds.
The buzzard is the ugliest bird in the United States. In fact, it may well be the ugliest bird in the world. It has a small, bare, pink head. Its thick body is covered with dark, rough feathers.
In spite of its looks, the buzzard is important to the people of Hinckley. It is their first sign of spring. After a winter in the south, buzzards return to their homes in the north. In the Hinckley area, they always return on March 15. No one knows why. But they have come back to Hinckley Ridge on that day, sure as clocks work, for at least forty years.
The excitement starts in February. By the middle of March it has reached a high peak. Bets are placed. Prizes go to the person who sees the first buzzard. Radio stations and newspapers tell of the coming festival. And on the weekend after March 15 the people of Hinckley hold their Buzzard Festival.
The people come and look around. They chat. They eat their fill of pancakes and sausages. Then they drive past Buzzard's Roost on Hinckley Ridge.
A lot of them stop near the road at the stand set up to give information to visitors. There they can hear, from a recording, the main facts about the buzzard. They can see a stuffed buzzard. They can look at some pictures taken of buzzards in other years. With good luck and a strong pair of field glasses, they may sight one or two live buzzards high in the sky.
Buzzards may be ugly. They may be "flying garbage cans". But in Hinckley they are just as welcome as the swallows in Capistrano, California. It would be a sad spring indeed if the buzzards ever failed to come back to Hinckley Ridge

1. 1.

   A good title for this story would be __________

   1. A.
      The Hinckley Buzzard Festival
   2. B.
      Buzzard, the Ugliest Bird
   3. C.
      Why the Buzzard Has a Pink Head
   4. D.
      The Return of“The Garbage Can"
2. 2.

   The buzzard is called the "flying garbage can" because it __________

   1. A.
      is ugly
   2. B.
      eats waste and dead animals
   3. C.
      looks like a garbage can
   4. D.
      collect rubbish on the ground
3. 3.

   The surprising thing about Hinckley's buzzards is that＿

   1. A.
      they spend the winter in the south
   2. B.
      they come very close to the town
   3. C.
      they return on the same day each year
   4. D.
      both buzzards and swallows return to Capistrano on March 15
4. 4.

   At the information stand, visitors to Hinckley's Buzzard Festival can _________

   1. A.
      learn some facts about the buzzard
   2. B.
      easily see a live buzzard
   3. C.
      take some pictures with the background of live buzzards
   4. D.
      feed their fill of pancakes and sausages to buzzards