PALO ALTO, California—“Switching off the television may help prevent children from getting fatter—even if they do not change their diet or increase the amount they exercise, ”US researchers said last week.?

A study of 192 third and fourth graders, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds(0.9 kg) less over a one-year period than those who did not change their television diet.?

“The findings are important because they show that weight loss can only be the result of a reduction in television viewing and not any other activity,” said Thomas Robinson, a pediatrician(儿科专家) at Stanford University.?

“American children spend an average of more than four hours per day watching television and videos or playing video games, and rates of childhood being very fat have doubled ?over? the past 20 years,” Robinson said.?

In the study, presented this week to the Pediatric Academic Societies' annual meeting in San Francisco, the researchers persuaded about 100 of the students to reduce their television viewing by one-quarter to one-third.?

Children watching fewer hours of television showed a significantly smaller increase in waist size and had less body fat than other students who continued their normal television viewing, even though neither group ate a special diet or took part in any extra exercise.?

“One explanation for the weight loss could be that the children unstuck to the television may simply have been moving around more and burning off calories,” Robinson said.?

“Another reason might be due to eating fewer meals in front of the television. Some studies have suggested that eating in front of the TV encourages people to eat more,” ?Robinson? said.?

The author tries to tell us in the first two paragraphs that _______.

A. children will get fatter if they eat too much?

B. children will get thinner if they eat less?

C. children will get fatter if they spend less time watching TV?

D. children will get fatter if they spend more time watching TV?

According to the passage, the time American children usually spend on watching TV_______.

A. is more than four hours a day   B. is less than four hours a day?

C. doubled in the last twenty years       D. is more than on any other activities?

The time children spend on TV viewing every day is suggested to be about _______.?

A. six hours    B. eight hours C. three hours D. one hour?

Which one of the followings is right??

A. Children usually eat fewer while watching TV.?

B. Children usually eat more while watching TV.?

C. Children eat the same amount of meals while watching TV.?

D. Children usually eat nothing while watching TV.?

Perhaps you will visit New York one day. You might be a student there. Here is some advice.?

Get a good map of the city. It will also have subway and bus maps. Remember the directions—uptown, downtown, east and west. Feel the excitement of New York .Have fun!?

NEW YORK CONVENTION AND VISITORS BUREAU?

Address:90 East 42nd Street,N.Y.100017?

Telephone:687?1300?

TIMES SQUARE INFORMATION CENTER?

Address:43rd Street between Seventh Avenue and Broadway?

Telephone:593?8983?

TRAVELERS' AID SOCIETY?

Address:204 ast 39th Street,N.Y.10016(central office)?

Telephone:679?0200?

TRAVEL INFORMATION:NEW YORK SUBWAYS AND BUSES?

Telephone:330?1234?

OTHER TELEPHONE NUMBERS?

The weather:WE 6?1212.The time:ME 7?1212?

Emergency (Police,Fire,or Ambulance):911 or “0” for operator?

A doctor:897?1000?

USEFUL BOOK?

Seeing New York; The official MTA Travel Guide,published by the Metropolitan Transportation Authority.?

What would be the best title for the passage??

A. Introductions and directions

B. This is New York?

C. Information and advice

D. Have fun here?

If you lose your passport in New York, you may probably get help from _______.?

A. CONVENTION AND VISITORS BUREAU?

B. TIMES SQUARE INFORMATION CENTER?

C. USEFUL BOOK?

D. TRAVEL INFORMATION?

If a visitor wanted to take a train, he could get some help by dialing the number “_______”.?

A. 897?1000    B. 330?1234      C. WE 6?1212     D. 911 or “0” ?

It will be hot—hot enough that most locals will have cleared town for cooler places. But because athletes competing at the 2004 Olympics have no choice but to stay in the hot weather, many plan to turn to science to stay cool.?

Some will put their hands in ice water just before competing and nearly all will be wearing fabrics(织物) designed with hot weather in mind.?

“Normally we warm up before exercise,”said Gordon Sleivert, director of sports science and medicine at the Canadian Sport Center in Victoria, British Columbia.“But in this case we're taking the warm out of warm up. It's like pre-cooling.”

Experts are predicting(预测) the average high this August in Athens will be 90 degrees Fahrenheit, with temperatures often reaching above 100(the average temperature in Sydney for the 2000 summer games was 64).?

Although some events, such as the marathon, will start early(1 a.m.) to avoid hot weather, other competitors will be pushing their limits during high temperatures.?       Drinking lots of water will help athletes keep cool, but humidity(湿度) remains a problem. The body's ability to cool down is weakened by damp air since sweat drips off the skin rather than evaporates(蒸发),resulting in dehydration(脱水) without the cooling.?

“Getting hot is a real problem because when our brains heats up, the brain waves are more like when you're really sleepy. Everything feels harder,” said Sleivert.

The passage mainly tells us that _______.

A. why it is very hot in Athens?

B. the hot weather is a big problem for Olympic athletes?

C. how important science is to every athlete?

D. the Olympics will be put off because of the hot weather?

The underlined sentence “other competitors will be pushing their limits during high temperatures”in the fifth paragraph means _______.?

A. Olympic athletes will put off their competition time?

B. some events in the Olympics will have to be put forward?

C. competitors can't reach their limits in the hot weather?

D. competitors will have to try their best to compete under any condition?

The following things will be likely to happen in the hot weather EXCEPT _______.

A. dehydration?

B. being sleepy?

C. that the blood in the body can become less and less?

D. that the body's ability to cool down is weakened

I don't mind picking up your things from the store. _______,the walk will do me good.

A. Sooner or later  B. Still    C. In time       D. Besides?

After ten years, she changed a lot and looked different from _______ she used to be.?

A. that      B. whom          C. what   D. who?

Mary had promised to give me a ticket for tomorrow. She failed, ____.

A. either    B. though    C. but    D. too

—The weather is too cold        March this year.

—It was still        when I came here years ago.

A.for;colder                  B.in;cold                      C.in;hot                        D.for;hotter

At present         robots are common in industry and perhaps they will soon be common in

       home.

A.the;a                         B./;/                             C./;the                          D.the;/

—Sorry,Sir.I can’t answer this question.

—Well,you are supposed        this part of history.

A.reading                            B.to be reading             C.to have read               D.having read

—Can I see you at 3:00 p.m. next Monday?

—I’m afraid not.I         to New York long before then.

A.have flown                B.will fly                            C.am flying                  D.will have flown