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When several different people look at the same person，it's not unusual for each of them to see different things；when you alone observe one behavior or one person at two different times，you may see different things.The following are but some of the factors that lead to these changing perceptions(感知认可)．
(1)Each person's perceptions of others are formed by his or her own cultural conditioning education，and personal experiences.
(2)Sometimes perceptions differ because of what we choose to observe and how we deal with what we've observed.It is not necessarily true that person's perception is based on observations of a particular person.Your observations may be totally controlled by what others have told you about this person；or you may focus (聚集)primarily on the situation or role relationship.Most people do not use the same yardstick(标准)to measure their parents，their friends and strangers.
(3)Sometimes we see only what we want to see or don't see what may be obvious to others because of our own needs，desires，or temporary emotional states.This is a process known as selective perception.Selective perception is obviously more difficult when contradictory (矛盾的)information is particularly obvious，but it can be done.We can ignore(忽视)the “stimulus”．He's basically a good boy so what I saw was not shoplifting.
We can reduce the importance of the contradictory information—All kids(孩子)get into mischief(顽皮)．Taking a book from the bookstore isn't such a big deal.“We can change the meaning of the contradictory information.” It wasn't shoplifting because he was going to pay for it later.
The first factor given by the author that affects our perception is ________.

A．the abilities of one's auditory (听觉的)and visual (视觉的)sensors

B．cultural background and personal experiences

C．experiences one learns from others

D．critical measures taken by other people

While observing a particular person，________.

A．one is likely to take all aspects(方面)to consideration

B．one pays more attention to his/her advantages

C．children often differ from grownups in perception

D．one tends to choose certain cues(提示)to look for

Observation of the same person by two people at the same time may differ because ________.

A．their measuring yardsticks are not the same

B．either of them may be slow to catch information

C．the time for observation is not long enough

D．each of them uses different language to express his/her impressions

NEW YORK (Reuters Health)—Kids who eat better perform better in school, a new study of Nova Scotia fifthgraders confirms.
Students who ate an adequate amount of fruit，vegetables，protein，fiber and other components of a healthy diet were significantly less likely to fail a literacy test，Dr.Paul J．Veugelers of the University of Alberta in Edmonton and colleagues found.
While a healthy diet is generally assumed to be important for good school performance, there has actually been little research on this topic, Veugelers and his colleagues note.To investigate，they looked at 4, 589 fifthgraders participating in the Children's Lifestyle and Schoolperformance Study, 875 (19.1 percent) of whom had failed an elementary literacy assessment.
The better a student's eating habits based on several measures of diet quality，including adequacy and variety, the less likely he or she was to have failed the test, the researchers found，even after they adjusted the data for the effects of parental income and education, school and sex.Eating plenty of fruit and vegetables, and getting fewer calories from fat, was also associated with a lower risk of failing the test.
To date, Veugelers and his team say, most research on diet and school performance has focused on the importance of eating breakfast, as well as the ill effects of hunger and malnutrition(营养不良)．
“This study extends current knowledge in this area by demonstrating the independent importance of overall diet quality to academic performance.We should not only realize the importance of children's nutrition at breakfast but also that throughout the day，” the researchers conclude.
Another research from the UK is suggesting that children's diets in the preschool years affects how they perform at school later on.The researchers from the Institute of Education, at the University of London say in fact that what children were eating in those days before primary school has more of an effect than the chicken nuggets(块) they ate at lunchtime.The researchers say they have found that children who ate a diet of “junk food” at the age of three, made less progress in school between the ages of six and ten.They say children's diet at later ages appears to have less impact on their school attainment.
．According to Dr.Paul J．Veugelers, students who have a healthy diet________.

A．are more likely to fail in their school performance

B．definitely can perform better in their school work

C．usually have more of fat and less of fruit and vegetables

D．tend to perform better in their school work

．It can be implied from the passage that________.

A．little research has been done on the importance of breakfast

B．most students participating in the research failed the test

C．the adequacy and variety of foods can mean better school performance

D．eating more chicken nuggets leads to good school performance

．The underlined word “literacy” (in Para.2) probably refers to ________.

A．the ability to read and write

B．a guessing game

C．the art of painting

D．the ability to handle practical task

．Which of the following statements is TRUE?

A．Children should have more“junk food”at lunch time.

B．Preschool diets can have more impact on children's school work.

C．A child who often has“junk food”at 3 is bound to fail in school work.

D．The older a child is，the more impact of what he eats has on school work.

Some people can stay up all night and still get work done the next day.I'm not one of them.After a night without enough sleep, I feel badtempered.I have trouble remembering things.And all I want to do is to crawl into bed and sleep.
How do you feel after you've stayed up late to finish schoolwork? Or the day after an overnight party? Scientists now say that your answers to these questions may depend on your genes.
New research suggests that a gene called “period 3” affects how well you function without sleep.The “period 3” gene comes in two forms：short and long.Everyone has two copies of the gene.So, you may have two longs, two shorts, or one of each.Your particular combination depends on what your parents passed on to you.
Scientists from the University of Surrey in England studied 24 people who had either two short or two long copies of “period 3”．Study participants had to stay awake 40 hours straight.Then，they took tests that measured how quickly they pushed a button when numbers flashed on screen and how well they could remember lists of numbers.
Results showed that the people with the short form of “period 3” performed much better on these tests than the people with the long form did.In both groups，people performed worst in the early morning.
After the first round of experiments，participants were finally allowed to sleep.People in the group that performed well on the tests (those with the short form of “period 3”) took about 18 minutes to nod off.
People with the long “period 3” gene, by contrast, fell asleep in just 8 minutes.They also spent more time on deep sleep.That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working in top form.
I think I must have the long form of“period 3”．What about you?
The purpose of this passage might be________.

A．to tell us the importance of plenty of sleep

B．to tell the result of a research on sleepy gene

C．to inform the harm of lacking sleep

D．to announce the sleeping rules of humans

Which of the following decides how well you perform without sleep?

A．One short form.

B．One long copy.

C．One short and two long copies.

D．Period 3.

What kind of people need less sleep according to the research?

A．Those with two long copies of the gene.

B．Those with two short copies of the gene.

C．Those with one short and one long copy of the gene.

D．Those with three short copies of the gene.

If one lacks enough sleep，one should avoid doing important or dangerous things ________.

A．at dawn	B．at night
C．in the afternoon	D．at noon

That the Leaning Tower of Pisa no longer leans quite so much after a ￡20 million project to save it has proved to be a great success.The tower, which was on the edge of collapse, has been straightened by 18 inches, returning it to its 1838 position.

“It has straightened a little bit more than we expected, but very little helps, ”said Prof.John Burland, the only British member of the rescue committee.“The tower is still very slightly moving towards being upright. ”
The tower, which has been leaning almost since building work first began in 1173, was closed to the public in 1990 because of safety fears.The 183foot tower was nearly 15 feet off vertical and its structure was found to have been weakened by centuries of strain(作用力).
Prof.Burland said it could have collapsed “at any moment”．However, it took nine years of quarreling before any work was done.The last attempt at straightening the tower was carried out. Concrete was poured into the foundations, but the result was that the tower sank further into the soil.
The straightening work involved digging out around 70 tonnes of earth from the northern side of the tower, causing it to sink on that side.Before the digging started, the tower was fixed with steel ropes and 600 tonnes of lead weights.
However, halfway through the project, concerns at the ugliness of the weights led to their removal and the tower leaned greatly.The weights were hurriedly reattached. In one night, the tower moved more than it had averaged in an entire year.The tower's stonework has also been restored.
The Italian government stepped in after a tower collapsed in Pavia in 1989, killing four people.Experts suddenly realized that the tower at Pisa, which was similarly built and on the same sort of earth, could do the same.
What would be the best title for the passage?

A．The Building of the Leaning Tower of Pisa

B．Saving the Leaning Tower of Pisa

C．The Collapse of the Leaning Tower of Pisa

D．The History of the Leaning Tower of Pisa

According to the passage, the Leaning Tower of Pisa_________________.

A．closed for the straightening work in 1990

B．began to lean more than 800 years ago

C．has a history of more than 1, 000 years

D．has become vertical

What drove the Italian government to save the Leaning Tower of Pisa?

A．The development of new technology.

B．The advice of Prof. John Burland.

C．The expectation of the rescue committee.

D．The collapse of a tower in Pavia.

What most probably played the most important part in straightening the tower?

A．The lead weights fixed to the tower.

B．Restoring the stonework.

C．Pouring concrete into the foundations.

D．Digging earth from the southern side of the tower.

February has long been a month of romance.With the sweet smell of roses in the air, romantic films hit cinemas and love stories fill newspapers and magazines.
On the 14th day, it is a custom for a boy to take his girlfriend out to dinner, buy her flowers and chocolates, write poems, sing to her or even spell out her name with rose petals! This is what you see on Valentine's Day, a day named after Valentine who was a priest in third century Rome.When the emperor decided that single men could become better soldiers than those with wives, he didn't allow marriage.
But Valentine continued to perform marriage ceremonies for young lovers in secret.When his actions were discovered, the emperor had him put to death.While in prison, it is said that Valentine fell in love with the daughter of his prison guard.Before his death, he wrote her a letter, which he signed “From your Valentine”， an expression that is still in use today.Valentine died for what he believed in and so was made a Saint(圣者), as well as becoming one of history's most romantic characters.
Nowadays, Valentine's Day is also popular among Chinese young people.Some students are planning to make Valentine's cards for parents, teachers and friends.Others want to hold parties at which they will exchange small gifts and eat heart－shaped cakes.The idea is to have fun and encourage people to share in the spirit of St.Valentine.
The best title should be __________.

A．Valentine's Day	B．A Brave Priest
C．Valentine's Day in China	D．A Romantic Man

What does the underlined word mean in Para.2?

A．树叶

B．枝条

C．花瓣

D．花粉

Why did the emperor in Rome NOT allow marriage in his country?

A．Because there were few women in his country at that time.

B．Because he thought men without wives could be better soldiers.

C．Because there wasn't enough food for so many people.

D．Because he wanted to control the birth rate.

Valentine was put into prison because __________.

A．he killed one of the soldiers

B．he stole a lot of food

C．he didn't obey the emperor's order

D．he didn't want to be a soldier