The amount of time children spend in institutional care（机构式照顾）may affect how their brains develop. That’s the conclusion of a new study carried out by researchers at the University of Wisconsin, Harvard Medical School and the University of Minnesota. The study is published in Child Development in the journal’s January/ February 2010 issue.
To learn how the lack of care and material needs that institutionalized children often experience affect brain development, the researchers looked at 132 8- and 9-year-olds. Some of them were adopted into U.S. homes after spending at least a year and three quarters of their lives in institutions in Asia, Latin America, Russia and Eastern Europe, and Africa. Others were adopted by the time they were 8 months old into U.S. homes from foster care（寄养）in Asia and Latin America; most of these children had spent no time in institutional care, while some had spent a month or two in institutions prior to foster placement. On average, the internationally adopted children had been living with their families for more than 6 years. These children were compared to a group of American children raised in their birth families.
Children adopted early from foster care didn't differ from children raised in their birth families in the United States. Children adopted from institutional care performed worse than those raised in families on tests measuring visual memory and attention, learning visual information, and impulse （冲动）control. Yet these children performed at developmentally appropriate levels on tests involving sequencing and planning.
The take-home message: Children make tremendous advances in cognitive（认知的） functioning once they reach their adoptive families, but the early impact on their brains' development is difficult to change completely.
"We identified basic learning processes that are affected by early institutionalization," notes Seth Pollak, professor of psychology and pediatrics at the University of Wisconsin, who was the study's lead author. "Policies that speed the time in which children can be removed from institutionalized care so they can develop within family contexts should be implemented to decrease the likelihood of learning problems later in children's lives."
67．The passage is mainly written to___________.
A．compare two childcare systems      B．criticize the institutional childcare
C．present a new research finding          D．introduce the basic learning process
68．Children have their brain development affected in institutional care because__________.
A．they suffer form poor living conditions
B．they spend too much time learning
C．they don’t have freedom staying there
D．they are neither physically nor mentally satisfied
69．Compared with home-raised children, institutionalized children didn’t do as well in tasks like__________.
A．thinking in pictures and self-control
B．working in teams and self-expression
C．putting things in order and self-defense
D．adapting to the environment and self-panning.
70．It can be concluded form the passage that__________.
A．the United States is a good place for children’s all-round development
B．a perfect family is beneficial to children’s all-round development
C．children in institutional care can hardly achieve anything great
D．nothing has been done to help children in institutional care

第三部分：阅读理解（共20小题；每小题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题
卡上将该项涂黑。
The 2009 outbreak of HINI is a new kind of influenza virus, commonly referred to as “swine flu”. It is thought to be a break of four known kinds of influenza. A virus subtype H1N1: one endedmic(流行病) in humans, one endemic in birds, and two endemic in pigs (swine). The source of the outbreak in humans is still unknown, but cases were first discovered in the U.S. and soon after in Mexico.
According to the U.S. Centers for Disease Control and Prevention(CDC)，it is not yet clear how serious this new virus actually is compared with other influenza viruses, although on May 26 they stated that new cases in the U.S. have probably reached the hightest point, and most cases have so far been mild relative to “seasonal flus”. But because this is a new virus, most people will not have immunity(免疫性) to it, and illness may eventually become more severe and widspread. The H1N1 flu mainly spreads in the same way that regular “seasonal influenza” spreads through the air from coughs and sneezes or touching those infected. It cannot be transmitted from eating cooked pork or by being in close contact with pigs.
As yet there is no vaccine(疫苗) available to prevent infection although companies are in the planning stages for having one available later this year. But there is concern that the virus could vary again over the coming months, leading to a new and potentially more dangerous flu outbreak later in the year, and a vaccine that will be less effective in preventing its spread.
As of May 27, the virus had spread to more than 50 countries; however, over 80% of reported deaths have taken place in Mexico. According to the CDC, the fact that the flu’s infection activity is now monitored more closely may help explain why more flu cases than normal are being recorded in Mexico, the United States and other countries.    
1. The 2009 outbreak of H1N1 is thought to      .
A.be concerned with four endmics                                             
B.have come from the virus from pigs
C.occur because of unknown virus in Mexico
D.be caused because of people without immunity
2.According to the U.S. Centers for Disease Control and Prevention, ______.
A.most people won’t be infected with the flu                                           
B.the H1N1 will not be too mild to cause many deaths in the world
C.the present situation allows of no optimist
D.H1N1 can be transmitted by touching pigs                             
3.To make people worried more is that      .
A.no effective vaccine can prevent the virus from spreading
B.the virus will mutate in the following months
C.a seasonal influenza will break out
D.the newly-developed vaccine will lose effectiveness
4.From the passage we can learn that      .
A.every country is watching closely the spreading of the H1N1                        
B.more than one-fourth of the deaths from the H1N1 are in Mexico                          
C.only the United States and Mexico recorded the cased of influenza                                                                     
D.effective medicine has been produced to cure the H1N1         

第三部分：阅读理解（共20小题；每小题2分，满分40分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题

卡上将该项涂黑。

The 2009 outbreak of HINI is a new kind of influenza virus, commonly referred to as “swine flu”. It is thought to be a break of four known kinds of influenza. A virus subtype H1N1: one endedmic(流行病) in humans, one endemic in birds, and two endemic in pigs (swine). The source of the outbreak in humans is still unknown, but cases were first discovered in the U.S. and soon after in Mexico.

According to the U.S. Centers for Disease Control and Prevention(CDC)，it is not yet clear how serious this new virus actually is compared with other influenza viruses, although on May 26 they stated that new cases in the U.S. have probably reached the hightest point, and most cases have so far been mild relative to “seasonal flus”. But because this is a new virus, most people will not have immunity(免疫性) to it, and illness may eventually become more severe and widspread. The H1N1 flu mainly spreads in the same way that regular “seasonal influenza” spreads through the air from coughs and sneezes or touching those infected. It cannot be transmitted from eating cooked pork or by being in close contact with pigs.

As yet there is no vaccine(疫苗) available to prevent infection although companies are in the planning stages for having one available later this year. But there is concern that the virus could vary again over the coming months, leading to a new and potentially more dangerous flu outbreak later in the year, and a vaccine that will be less effective in preventing its spread.

As of May 27, the virus had spread to more than 50 countries; however, over 80% of reported deaths have taken place in Mexico. According to the CDC, the fact that the flu’s infection activity is now monitored more closely may help explain why more flu cases than normal are being recorded in Mexico, the United States and other countries.    

1. The 2009 outbreak of H1N1 is thought to      .

A.be concerned with four endmics                                             

B.have come from the virus from pigs

C.occur because of unknown virus in Mexico

D.be caused because of people without immunity

2.According to the U.S. Centers for Disease Control and Prevention, ______.

A.most people won’t be infected with the flu                                           

B.the H1N1 will not be too mild to cause many deaths in the world

C.the present situation allows of no optimist

D.H1N1 can be transmitted by touching pigs                             

3.To make people worried more is that      .

A.no effective vaccine can prevent the virus from spreading

B.the virus will mutate in the following months

C.a seasonal influenza will break out

D.the newly-developed vaccine will lose effectiveness

4.From the passage we can learn that      .

A.every country is watching closely the spreading of the H1N1                        

B.more than one-fourth of the deaths from the H1N1 are in Mexico                          

C.only the United States and Mexico recorded the cased of influenza                                                                     

D.effective medicine has been produced to cure the H1N1         

第三部分：阅读理解（共20小题；每小题2分，满分 40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
A university math tutor has discovered the science behind “singledom”, finding that our chances of finding the perfect partner are just 1 in 285,000. Peter Backus, a tutor at the University of Warwick, published his “Why I Don’t Have a Girlfriend” paper after a three-year love drought.
His unconventional study uses a famous math formula called The Drake Equation(德雷克等式), which was first used to estimate the existence of extra-terrestrial(地球以外) life.
The results don't look promising for British singles. 30-year-old Mr. Backus found that out of the 30 million women in the UK, only 26 would be suitable girlfriends for him.
The dull equation takes into account the number of women aged 24 to 34, living in his home city of London, and who are single, meaning his chances of meeting his dream woman on a night out are slim.
The economics expert said: “There are 26 women in London with whom I might have a wonderful relationship. So, on a given night out in London there is a 0.0000034% chance of meeting one of these special people. That’s a 1 in 285,000 chance, so it’s not great.”
The puzzling Drake equation reads: N =" R*" x Fp x Ne x Fi x Fc x L, and helped pioneering scientist Professor Drake to predict that there could be 10,000 civilizations in our galaxy.
Mr. Backus simply replaced the original equation with his own criteria for a dream date, which included the percentage of women likely to find him attractive, and the number of girls aged 24-34 in London. He said: “The research may sound depressing to people looking for love, but the good news for singles is, it’s probably not your fault!”
56. Mr. Backus’ discovery in this passage is mainly concerned about ______.
A. whether there exists life out of our planet
B. the possibility of his being able to find love
C. how to get rid of singledom
D. what math can do to serve our daily life
57. What does Mr. Backus think of the result of his research?
A. Optimistic.     B. Depressing.      C. Unrealistic.     D. Exciting.
58. What can we learn from the first paragraph?
A. Mr. Backus’ major research field is “singledom”.
B. Mr. Backus found a girlfriend three years ago.
C. Mr. Backus’ new thesis will surely be well received.
D. Mr. Backus has been searching for love for long.
59. By “the good news for singles” in the last sentence, Mr. Backus probably mean _____.
A. you don’t have to blame yourself for remaining single
B. maybe the discovery is not reliable at all
C. the result was based on his own criteria
D. there might be more dream date out of London
60. Which of the following statements is true?
A. This passage could be published in a scientific magazine.
B. The passage intends to prove there are other civilizations.
C. The passage writer doesn’t really understand the Drake equation.
D. Most women in London are not suitable for university teachers.

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.

Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．

"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

He said further studies are required to confirm the findings.

Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."

Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

64．What’s the best title of this passage?

  A．Sunshine 'helps to keep you young'

  B．Vitamin D has a protective effect on many diseases

  C．Telomeres - a biological marker of ageing

  D．People have found the secret to having a long life

65．How can people get vitamin D?

    A．through water            B．through sunshine     

       C．through food                 D．both B and C

66．What does the underlined word in paragraph three refer to?

    A．It refers to a kind of vitamin that can keep you young.

    B．It refers to a biological marker of ageing found in DNA.

    C．It refers to a kind of element that can be obtained from sunshine.

    D．It refers to a part of the body.

67．Which of the following is not true according to the passage?

    A．women with high levels of vitamin D shows a sign of being biologically younger and healthier.

    B．vitamin D has a protective effect on many ageing related diseases.

    C．too much sunshine may increase our risk of skin cancer.

    D．It has been proved that sunshine 'helps to keep you young'.