From my point of view, the theory that ______ by the scientist is not quite scientific.

It seems parents have long been right. Going to bed early is key to getting enough sleep and helping adolescents feel on top of the world, a new study reported.

A   1   of sleep among youngsters may    2   depression and suicidal (自杀的)thoughts, according to the study by the Columbia University Medical Center.

"Our results are   3   with the theory that inadequate sleep is a risk factor for depression, working with other   4   and protective factors through multiple possible causal pathways to the development of this   5   disorder," said lead author James Gangwisch.

"  6   quality sleep could therefore be a preventative measure against   7  and a treatment for depression," he added in the study   8   in the Friday issue of Sleep magazine.

The study followed the nightly habits of some 15,659 college and high-school students, and   9  those who consistently went to bed   10  midnight had a 24 percent higher risk of depression than those who turned in before 10:00 pm.

Night owls（夜猫子）also ran a 20 percent   11  risk of battling suicidal thoughts, the study added.

The American Academy of Sleep Medicine   12   that adolescents should sleep at least nine hours or more a night. Those who were tucked in before 10:00 pm reported they slept    13   about eight hours and 10 minutes.

But that amount of sleep   14  significantly for those in bed after midnight.

And adolescents who slept five hours or less a night were 71 percent more   15  to suffer depression and 48 percent more     16   becoming suicidal, the study said.

"It is a common perception and societal   17  that adolescents do not need as much sleep as pre-adolescents, yet studies suggest that adolescents may  18   require more sleep," said Gangwisch.

"Studies have found that adolescents do not go to bed   19  enough to make up for earlier school start times, and transitions to earlier school start times have been shown to be   20  with significant sleep deprivation（剥夺）. "

(    ) 1. A. night                B. moderation       C. limit                D. lack

(    ) 2. A. result in           B. lie in                C. come about       D. bring in

(    ) 3. A. opposed           B. mixed              C. related              D. consistent

(    ) 4. A. risk                  B. chance              C. potential           D. reason

(    ) 5. A. mood                      B. body                C. feeling             D. mind

(    ) 6. A. little                B. lack                 C. Adequate          D. over

(    ) 7. A. suffering          B. depression               C. disorder            D. sadness

(    ) 8. A. reported           B. published          C. reflected           D. noted

(    ) 9. A. found                      B. investigated      C. appraised          D. supported

(    ) 10. A. before            B. from                C. by                    D. after

(    ) 11. A. lower             B. higher              C. more                D. less

(    ) 12. A. appeals           B. recommends     C. calls                 D. plans

(    ) 13. A. on average      B. in place            C. ahead of           D. in number

(    ) 14. A. increased               B. disappeared       C. strengthened     D. dropped

(    ) 15. A. likely             B. probable           C. possible            D. perhaps

(    ) 16. A. at sight of       B. at risk of          C. in front of               D. as a result of

(    ) 17. A. wish               B. expectation       C. suggestion               D. attempt

(    ) 18. A. exactly           B. immediately      C. directly            D. actually

(    ) 19. A. early              B. lately                      C. soon                 D. quickly

(    ) 20. A. separated               B. associated         C. divided             D. depended

Michael Fish may soon be replaced as a weather forecaster by something truly fishier---the shark(鲨鱼).

Research by a British biology student suggests that sharks could be used to predict storms.

Lauren Smith, 24, is close to completing her study on shark’s ability to sense pressure.

If her studies prove the theory, scientists may be able to monitor the behaviour of sharks to predict bad weather.

Miss Smith had previously studied the behaviour of lemon sharks in the Bahamas.

She then used their close relatives, lesser spotted dogfish, for further research at Aberdeen University.

Her work---thought to be the first of its kind to test the pressure theory ---- resulted from the observation that juvenile blacktip sharks(黑边鳍真鲨) off Florida moved into deeper water ahead of a violent storm in 2001.

Miss Smith said: “I’ve always been crazy about traveling and diving and this led me to an interest in sharks.”

“I was delighted to have been able to research in the area for my degree. I know there’s so much more we need to understand ---- but it certainly opens the way to more research.”

It has been discovered that a shark senses pressure using hair cells in its balance system.

At the Bimini Shark Lab in the Bahamas, Miss Smith fixed hi-tech sensors to sharks to record pressure and temperature, while also tracking them using GPS (Global Positioning System) technology.

In Aberdeen, she was able to study the effects of tidal(潮汐的) and temperature changes on dogfish----none of which were harmed. She also used a special lab which can mimic(模拟) oceanic pressure changes caused by weather fronts.

She is due to complete her study and graduate later this year. She says she will be looking for a job which will give her the chance to enrich her experience of shark research. 

The passage is most probably taken from _____.

A. a short-story collection

B. a popular science magazine

C. a research paper

D. a personal diary

What do we learn from the first four paragraph of the passage?

A. Sharks may be used to predict bad weather.

B. Sharks’ behaviour can be controlled.

C. Michael Fish is not qualified for his job.

D. Lauren Smith will become a weather forecaster.

Lauren Smith conducted her research by _______.

 A. removing hair cells from a shark’s balance system

 B. measuring the air pressure of weather fronts

 C. recording sharks’ body temperature

 D. monitoring sharks’ reaction to weather changes

What is the passage mainly about?

 A. A popular way of forecasting weather.

 B. A new research effort in predicting storms.

 C. Biologists’ interest in the secrets of sharks.

 D. Lauren Smith’s devotion to scientific research.

The theory he sticks to ______ to be of no use in our studies.

The city can seem a cold, mean place. In the middle of so many people hurrying about their own business, a person can feel alone among the millions of others.

    There is a popular view that in cities, strangers are less likely to help an elderly person cross a street or call the police when they see a bike being stolen. Recently, a New Yorker named Casey Neistat did an experiment. He chained up his bike in several public places, then "stole" it in a number of obvious ways, such as using a hacksaw (钢锯). He filmed everything to see whether other New Yorkers would try to stop a shameless bike theft. The result? People just walked on by.

    Is this evidence of an immoral, selfish urban society? Not necessarily. According to another recent study, the way city people mind their own business is about other factors besides morality (道德).

This is called the Bystander Effect, the theory that city people do not react because of the urban enviromnent they live in.

Psychologist Dr. Harold explained why people did not involve themselves in Neistat's bike theft experiment with the Bystander Effect.

    First, people who live in cities are surrounded by so much activity that they stop noticing what is going on around them. Second, they are less easy to surprise and assume every activity has a logical explanation.

    "The third is that people notice it, but they don't know what to do," he continued. "And the fourth is fear — they know they should do something, but they're afraid to challenge someone with a hacksaw."

A lack of concern is only a small reason why people don't take action, concludes Dr. Harold.

     Despite the results of Neistat's experiment, there is also evidence of a sense of team spirit that connects people in cities. All it takes is a funny joke or a shared interest to start a conversation with someone at a bus stop. When city folk are in trouble, they come together for support — famously in New York on September 11, 2001.

City society is different, but that doesn't mean it's cold or mean — it just means it's busy!

1.Casey Neistat fihned everything in the experiment with the purpose of        .

    A. proving that he was not the thief

    B. telling people that bike theft was immoral

    C. finding out who had a sense of right and wrong

    D. making his experiment well-known to the public

2.We can infer from the third paragraph that morality       .

    A. can partly explain a selfish urban society

    B. is what our society should pay special attention to

    C. is the only factor that leads to a selfish urban society

    D. is the root of the Bystander Effect mentioned in the passage

3.The underlined part September 11, 2001 in Paragraph 9 serves as       .

    A. a reminder of the sad memories

    B. a way to prove Dr Harold's Bystander effect

    C. evidence that city life can be really dangerous

    D. an example to show team spirit connecting city people

4.As can be inferred from the passage, the writer probably       .

    A. criticizes the loss of morality in urban society

    B. feels sad about the result of Neistat's experiment

    C. thinks city people are too busy to care about others

D. disagrees that city life sometimes can be cold and mean