When an emergency situation occurs, observers are more likely to take action if there are few or no other witnesses． This phenomenon is referred to as the bystander effect．
The bystander effect is also called the Genovese effect, which is named after Catherine “Kitty" Genovese, a young woman who was cruelly murdered on March 13, 1964． Early in the morning, 28-year-old Genovese was returning home from work． As she approached her apartment entrance, she was attacked and stabbed （刺） by a man later identified as Winston Moseley． Despite Genovese's repeated cries for help, none of the dozen or so people in the nearby apartment building who heard her cries called police for help． The attack first began at 3:20, but it was not until 3:50 that someone first contacted police．
Many psychologists were set thinking by the incident, as well as most Americans． As the conclusion, the bystander effect came out and later proved by a series of studies and experiments．
There are two major factors that contribute to the bystander effect． First, the presence of other people creates a division of responsibility． Because there are other observers, individuals do not feel as much pressure to take action, since the responsibility to take action is thought to be shared among all of those present． The second reason is the need to behave in correct and socially acceptable ways． When other observers fail to react, individuals often take this as a signal that a response is not needed or not appropriate．
Other researchers have found that onlookers are less likely to take action if the situation is ambiguous． In the case of Kitty Genovese, many of the 38 witnesses reported that they believed that they were witnessing a "lovers' quarrel", and did not realize that the young woman was actually being murdered．
【小题1】The bystander effect is also called the Genovese effect because          a woman surnamed Genovese．  

LONDON—Here’s a new warning from health experts：Sitting is deadly.

Scientists are increasingly warning that sitting for long periods—even if you also exercise regularly—could be bad for your health.And it doesn’t matter where the sitting takes place—at the office，at school，in the car or before a computer or TV—just the overall number of hours it occurs.Several studies suggest people who spend most of their days sitting are more likely to be fat，have a heart attack or even die.

In an editorial published this week in the British Journal of Sports Medicine，Elin Ekblom?Bak of the Swedish School of Sport and Health Sciences suggested that authorities rethink how they define physical activity to highlight the dangers of sitting.

While health officials have issued guidelines recommending minimum amounts of physical activity，they haven’t suggested people try to limit how much time they spend in a seated position.

“After four hours of sitting，the body starts to send harmful signals，”said Ekblom?Bak.She explained that genes regulating(调节) the amount of glucose(葡萄糖) and fat in the body start to shut down.

Even for people who exercise，spending long periods of time sitting at a desk is still harmful.Tim Armstrong，a physical activity expert at the World Health Organization，said people who exercise every day—but still spend a lot of time sitting—might get more benefit if that exercise was spread across the day，rather than in a single bout(一回)．

Still，in a study published in 2009 that tracked more than 17,000 Canadians for about a dozen years，researchers found people who sat more had a higher death risk，whether or not they exercised.

“We don’t have enough evidence yet to say how much sitting is bad，” said Peter Katzmarzyk of the Pennington Biomedical Research Center in Baton Rouge，who led the Canadian study.“But it seems the more you can get up and interrupt this sedentary behavior，the better.”

Figures from a U．S. survey in 2003?2004 found Americans spend more than half their time sitting，from working at their desks to sitting in cars.

Experts said more research is needed to figure out just how much sitting is dangerous，and what might be possible to offset those effects.

“People should keep exercising because that has a lot of benefits，” Ekblom?Bak said.“But when they’re in the office，they should try to interrupt sitting as often as possible，” she said.

1.What is the best title for the text?

A．Not Sitting Too Much While Working

B．How to Avoid Sitting Too Much

C．Sitting Too Much Could Be Deadly

D．More and More People Sit Too Much

2.According to the research，________.

A．the more time you spend in exercising in a single bout(一回)，the healthier you will be

B．those who often sit too much are sure to grow fat or suffer from a heart attack

C．regular exercise is effective to get rid of the side effects of sitting too much

D．you had better not sit for more than four hours in a single bout

3.How does the danger of sitting too much affect the human body?

A．It results in a higher death risk.

B．It increases glucose and fat in the body.

C．It makes a person unable to exercise long enough in a day.

D．It causes the gene to fail to balance the glucose and fat in the body.

4.The underlined word “offset” in Paragraph 10 most probably means “________”．

A．improve? B．avoid

C．ignore? D．achieve

Charles Plumb was a US Navy jet fighter pilot in Viet Nam. After 75 missions, his plane was destroyed by a surface-to-air missile. Plumb parachuted down into enemy hands. He was captured and spent 6 years in a communist Vietnamese prison.
One day, Plumb and his wife were sitting in a restaurant when a man from another table came up and said “You’re Plumb! You flew jet fighters in Viet Nam from the aircraft carrier Kitty Hawk. You were shot down!”
“How in the world did you know that?” asked Plumb.
“I packed your parachute,” the man replied. “I guess it worked”. Plumb assured him, “It sure did. If your chute（降落伞） hadn’t worked, I wouldn’t be here today.”
Plumb couldn’t sleep that night, thinking about that man. Plumb says, “I kept wondering what he looked like in a Navy uniform: a white hat, a bib in the back, and bell-bottom trousers. I wonder how many times I might have seen him and not even said ‘Good morning. How are you?’ or anything because, you see, I was a fighter pilot and he was ‘just a sailor’”.
Plumb thought of the many hours the sailor had spent at a long wooden table in the bowels of the ship, carefully weaving the shrouds(伞罩) and folding the silks of each chute, holding in his hands each time the fate of someone he didn’t know.
Sometimes in the daily challenges that life gives us, we miss what is really important. We may fail to say hello, please, thank you, congratulate someone on something wonderful that has happened to them, give a compliment, or just do something nice for no reason. As you go through this week, this month, this year, recognize people who pack your parachutes.
【小题1】Why didn’t Plumb say hello to the sailor each time he passed him on the Kitty Hawk?

Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing? Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk about interests both enjoy, such as pop culture, he remembers his more distant relationship with his parents when he was a teenager.

“I would never have said to my mom, ‘Hey, the new Weezer album is really great. How do you like it?’” says Ballmer. “There was just a complete gap in taste.”

Music was not the only gulf. From clothing and hairstyles to activities and expectations, earlier generations of parents and children often appeared to move in separate orbits.

Today, the generation gap has not disappeared, but it is getting narrow in many families. Conversations on subjects such as sex and drugs would not have taken place a generation ago. Now they are comfortable and common. And parent—child activities, from shopping to sports, involve a feeling of trust and friendship that can continue int0 adulthood.

No wonder greeting cards today carry the message, “To my mother, my best friend.”

But family experts warn that the new equality can also result in less respect for parents. “There’s still a lot of strictness and authority on the part of parents out there, but there is a change happening,” says Kerrie, a psychology professor at Lebanon Valley College. “In the middle of that change, there is a lot of confusion among parents.”

Family researchers offer a variety of reasons for these evolving roles and attitudes. They see the 1960s as a turning point. Great cultural changes led to more open communication and a more democratic process that encourages everyone to have a say.

“My parents were on the ‘before’ side of that change, but today’s parents, the 40-year-olds, were on the  ‘after’ side,” explains Mr. Ballmer. “It’s not something easily accomplished by parents these days, because life is more difficult to understand or deal with, but sharing interests does make it more fun to be a parent now.”

41. The underlined word gulf in Para.3 most probably means _________.

A. interest

B. distance

C. difference

D. separation

42. Which of the following shows that the generation gap is disappearing?

A. Parents help their children develop interests in more activities.

B. Parents put more trust in their children’s abilities.

C. Parents and children talk more about sex and drugs.

D. Parents share more interests with their children.

43. The change in today’s parent-child relationship is _________.

A. more confusion among parents

B. new equality between parents and children

C.1ess respect for parents from children

D. more strictness and authority on the part of parents

44. By saying “today’s parents, the 40-year-olds, were on the ‘after’ side.” the author means that today’s parents _________.

A. follow the trend of the change

B. can set a limit to the change

C. fail to take the change seriously

D. have little difficulty adjusting to the change

45. The purpose of the passage is to _________.

A. describe the difficulties today’s parents have met with

B. discuss the development of the parent—child relationship

C. suggest the ways to handle the parent—child relationship

D. compare today’s parent—child relationship with that in the past

A report, published in last week's Journal of the American Medical Association, offers a picture of how risky it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a fatal(致命)accident as a teenager driving alone. By contrast, the risk of death for drivers between 30 and 59 decreases with each additional passenger.
The author also found that the death rates for teenage drivers increased dramatically after 10 p. m.,and especially after midnight. With passengers in the car,the driver was even more likely to die in a late night accident.
Robert Foss, a scientist at the University of North Carolina Highway Safety Research Center, says the higher death rates for teenage drivers have less to do with "really stupid behavior" than with just a lack of driving experience. "The basic thing, "he says, "is that adults who are responsible for issuing(发放) licenses fail to recognize how skilled a task driving is. "
Both he and the author of the study believe that the way to reduce the harm is to have so-called graduated licensing systems, in which getting a license is a slower process. A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving at night with a limited number of passengers before graduating to get a full driving license.
Graduated licensing systems have reduced teenage driver crashes, according to recent studies. About half of the states now have some sort of graduated licensing system in place, but only 10 of those states have number limitation on passengers. California is the strictest, with a new driver prohibited from carrying any passenger under 20 for the first six months.
76.Which of the following situations is most dangerous according to the passage?
A. Adults giving a lift to teenagers on the highway after 10 p. m.
B. A teenager driving after midnight with passengers in the car.
C. Adults driving with three or more teenage passengers late at night.
D. A teenager getting a lift from a stranger on the highway at midnight.
77.According to Robert Foss, the high death rate of teenage drivers is mainly due to_______.
A. their frequent driving at night         B. their lack of driving experience
C. their improper way of driving         D. their driving with passengers
78.Which of the following statements is true according to Paragraph 3 ?  
A. Teenagers should spend more time learning to drive.
B. Driving is a skill too difficult for teenagers to learn.
C. Teenagers should be limited in taking driving lessons.
D. People issuing license are partly responsible for the accidents.
79.A suggested measure to be taken to reduce teenagers'driving accidents is that_______
A. driving in the presence of an adult should be made a rule.
B. they should be forbidden to take on passengers
C. they should not be allowed to drive after 10 p. m.
D. the licensing systems should be improved
80.The present situation in about half of the states is that the graduated licensing system_______.
A. is under discussion              B. is about to be set up
C. has been put into effect                 D. has been perfected