Question

D

We live in a sweet world. The average American kids eat more than 20 teaspoons of sugar per day, and adults eat 50% more sugar today thati they did in the 1970s. We all know that too much sugar isn^t good for us. But did we know it could be dangerous? A team of researchers at the University of Utah used mice to do a study on the bad effects of sugar. They found it could have serious effects on people's health.

Sugar is found not only in sweets and candies, but also in many house?hold items like pasta and crackers.

During the 58-week-long study, mice were fed a diet containing 25% more sugar. This percentage equals a healthy human diet along with three cans of soda daily. The team found that these mice were twice as likely to die as mice fed a similar diet without the sugar. Though the mice did not show signs of obesity or high blood pressure, male mice produced 25% fewer offspring (后代)than the other mice.

Scientists often use mice for research because they have a similar genetic(基因的)structure to humans. "Since most substances (物质)that are danger?ous in mice are also dangerous in people, it's likely that those physical prob?lems that cause those mice to have increased deaths also work in people," says study author James Ruff of the University of Utah. Findings from this study show bad effects that are not as noticeable as weight gain or heart problems. Sugar can contribute to long-term changes in the body that can change development and even shorten lives.

Cutting sugar out of the American diet altogether may be difficult. But making the effort to control our nation's sugar need will provide for a truly sweeter future.

12.  The study done by researchers aimed at learning about____ .

  A.  the advantages and disadvantages of sugar

B.  the bad effects of sugar on people's health

C.  the genetic structure of mice

D.  American's eating habits

13.  According to the study, which of the following statements is WRONG?

  A.  Sugar can even shorten lives.

B.  Sugar's bad effects are not noticeable.

C.  Eating much more sugar can make mice put on weight and get high blood pressure.

D.  Mice are more likely to die when fed a diet containing 25 % more sugar.

14.  From the passage we can infer______ .

  A.  sugar plays a very important role in Americans' diet

B.  kids eat more sugar than adults in America

C.  the study on human beings lasted 58 weeks

D.  the genetic structure of mice is totally different from that of people

15.  Which would be the best title for the passage?

A. Living a sweet life           B. Kids eat much more sugar

C. Genetic structure of humans       D. Danger of too much sugar

Answer 1

D

[文章大意]糖在美国人的生活中起着重要作用。调查研究表明糖对人的身体健康可能有严重的影响。作者告诫人们要控

制吃糖。

12.B 细节理解题。由"A team of researchers at the University of Utah used mice to do a study on the

 bad effects of sugar. They found it could have serious effects on people's health."可知研究者对糖的

负面影响做了调查研究。他们发现糖对人的身体健康可能有严重的影响。故选B。

13.C 细节理解题。由"…the mice did not show signs of obesity or high blood pressure..."做实验的老

鼠并没有显示出肥胖和高血压的症状。故选C。

14.A 推理判断题。由"Cutting sugar out of the American diet altogether may be difficult."把糖从美国

人的饮食中去掉是困难的，由此可推知糖在美国人的饮食中占重要地位，选A。

15.D 主旨大意题。由第一段中的"We all know that too much sugar isn't good for us. But did we know

 it could be dangerous?"和第一段的最后一句可知选D。