More than 25 years ago, a train took Saroo Brierley, a 4-year-old boy, a thousand miles across the country to a totally strange city. There, he     1     (bring) up by an Australian family and flew to Tasmania, Australia with them.

    2     he writes in his new book, A Long Way Home, Brierley couldn’t help but wonder about his hometown back in India. He remembered landmarks, but since he didn’t know his town’s name, finding a small neighborhood in a vast country     3     (prove) to be impossible.

Then he found a digital mapping program. He spent years     4     (search) for his hometown in the program’s satellite pictures. In 2011, he came across     5     familiar. He studied it and realized he was looking at a town’s central business district     6     a bird’s-eye view. He thought “On the right-hand side you should see the three-platform train station”— and there it was. “And on the left-hand side you should see a big fountain” — and there it was. Everything just started to match.

When he stood in front of the house     7     he grew up as a child, he saw a lady standing in the entrance. “There’s something about me,” he thought — and it took him a few seconds but he finally remembered     8     she used to look like.

In an interview Brierley says, “My mother looked so much     9     (short) than I remembered. But she came forth and walked forward, and I walked forward, and my feelings and tears and the chemical in my brain, you know, it was like a nuclear fusion (核聚变). I just didn’t know what to say,     10     I never thought seeing my mother would ever come true. And here I am, standing in front of her.”

2 . Contact between adolescents (between the ages of 15 and 19) and their peers (同龄人) is a universal characteristic of all cultures. However, the nature and the degree of such contact ________ a great deal. In American contemporary society, adolescents spend much more time with their peers than with ________ or adults.

This pattern of age segregation (隔离) in American society did not become usual until the beginning of the industrialized society. Changes in the ________separated children from adults, with adults working and children attending school. The dramatic increase of mothers in the workplace has ________ contributed to (促成) the reduction in the amount of time adolescents spend with adults. School reform efforts during the nineteenth century, which ________ age-segregated schools and grades, have reduced the amount of time adolescents spend with younger children. Finally, the changes in population are considered a(n)________that may have contributed to the emergence of adolescent peer culture. From 1955 to 1975, the adolescent ________ increased dramatically, from 11 percent to 20.9 percent. This increase in the number of adolescents might be a contributing factor to the ________ in adolescent peer culture in terms of growth in size as well as in terms of its impact on society’s other cultures.

Research ________ the view that adolescent s spend a great deal of time with their peers. Reed Larson and his colleagues examined adolescents’ daily ________ and found that they spend more time talking to their friends than engaging in any other activity. In a typical week, ________, high school students will spend twice as much time with their peers as with adults. This gradual withdrawal (退出) from adults begins in ________ adolescence. In sixth grade, adults (excluding parents) account for only 25 percent of adolescent social ________ . Another important characteristic of adolescent peer________ is its increasingly autonomous (自治的) function. While childhood peer groups are conducted under the close supervision (监管) of parents, adolescent peer groups typically make an effort to ________ adult supervision and usually succeed in doing so.

3 . One of my wonderful memories is about a Christmas gift. Unlike other gifts, it came without wrap (包装).

On September 11th, 1958, Mum gave birth to Richard. After she brought him home from hospital, she put him in my lap, saying, “I promised you a gift, and here it is.” What an honour! I turned four a month earlier and none of my friends had such a baby doll of their own. I played with it day and night. I sang to it. I told it stories. I told it over and over how much I loved it!

One morning, however, I found its bed empty. My doll was gone! I cried for it.Mum wept and told me that the poor little thing had been sent to a hospital. It had a fever. For several days, I heard Mum and Dad whispering such words as “hopeless”, “pitiful”, and “dying”, which sounded ominous.

Christmas was coming. “Don’t expect any presents this year,” Dad said, pointing at the socks I hung in the living room.“If your baby brother lives, that’ll be Christmas enough.” As he spoke, his eyes filled with tears. I’d never seen him cry before.

The phone rang early on Christmas morning. Dad jumped out of bed to answer it. From my bedroom I heard him say, “What? He’s all right?” He hung up and shouted upstairs. “The hospital said we can bring Richard home!”

“Thank God!” I heard Mum cry.

From the upstairs window, I watched my parents rush out to the car. I had never seen them so happy. And I was also full of joy. What a wonderful day! My baby doll would be home. I ran downstairs. My socks still hung there flat. But I knew they were not empty; they were filled with love!

4 . Running is often tiring and a lot of hard work, but nothing beats the feeling you get after finishing a long workout around the track.

But while it’s long been believed that endorphins (内啡肽) —chemicals in the body that cause happiness—are behind the so-called “runner’s high”, a study suggested that there may be more to this phenomenon than we previously knew.

According to a recent study published by a group of scientists from several German universities, a group of chemicals called endocannabinoids (内源性大麻素) may actually be responsible for this familiar great feeling.

To test this theory, the scientists turned to mice. Both mice and humans release high levels of endorphins and endocannabinoids after exercise. After exercising on running wheels, the mice seemed happy and relaxed and displayed no signs of anxiety. But after being given a drug to block their endorphins, the mice’s behavior didn’t seem to change. However, when their endocannabinoids were blocked with a different drug, their runners’ high symptoms seemed to fade.

“The long-held notion of endorphins being responsible for the runner’s high is false. Endorphins are effective pain relievers, but only when it comes to the pain in your body and muscles you feel after working out,” Patrick Lucas Austin wrote on science blog Lifchacker.

Similar studies are yet to be carried out on humans, but it’s already known that exercise is a highly effective way to get rid of stress or anxiety. The UK’s National Health Service even prescribes (开药 方) exercise to patients who are suffering from depression. “Being depressed can leave you feeling low in energy, which might put you off being more active. Regular exercise can improve your mood if you have depression, and its especially useful for people with mild to moderate (中等的) depression,” it wrote on its website.

It seems like nothing can beat that feeling we get after a good workout, even if we don’t fully understand where it comes from. At least if we’re feeling down, we know that all we have to do is to put on our running shoes.

5 . You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?

Jane Addams (1860-1935)

Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community (社区) by creating shelters and promoting education and services for people in need. In 1931, Addams became the first American woman to win the Nobel Peace Prize.

Rachel Carson (1907-1964)

If it weren’t for Rachel Carson, the environmental movement might not exist today. Her popular 1962 book Silent Spring raised awareness of the dangers of pollution and the harmful effects of chemicals on humans and on the world’s lakes and oceans.

Sandra Day O’Connor (1930-present)

When Sandra Day O’Connor finished third in her class at Stanford Law School, in 1952, she could not find work at a law firm because she was a woman. She became an Arizona state senator (参议员) and, in 1981, the first woman to join the Supreme Court of the United States. O’Connor gave the deciding vote in many important cases during her 25 years on the top court.

Rosa Parks (1913-2005)

On December 1, 1955, in Montgomery, Alabama, Rosa Parks would not give up her seat on a bus to a passenger. Her simple act landed Parks in prison. But it also set off the Montgomery bus boycott (抵制). It lasted for more than a year, and kicked off the civil rights movement. “The only tired I was, was tired of giving in,” said Parks.

6 . Girls are better at reading and writing than boys as early as fourth grade, according to a study, and the gap continues to widen until senior year.

Scientists generally agree that boys and girls are psychologically more alike than they are different. But reading seems to be a(n)________, with growing evidence suggesting a similar ________in writing. The study, published in the journal American Psychologist, provided further ________ to support this view.

David Reilly, lead author of the study, said the study ________the commonly held view that boys and girls start grade school with the same cognitive abilities. “It appears that the gender gap for writing tasks has been greatly________, and despite our best efforts with changes in teaching methods, that does not appear to be ________ over time,” he said.

Factors explaining the results could include learning ________ being more prevalent among boys; the pressure to conform to masculine (男子汉的) ideals and the idea of reading and language being feminine (女性的); and slight________in how boys and girls use their brain hemispheres (半球), the authors believe.

To investigate how ________ levels differed between boys and girls in the U.S., the team studied data collected over three decades in the National Assessment of Educational Progress. This database of test scores on over 3 million students in the fourth, eighth, and twelfth grades________national and state performances in a range of subjects, and considered such variables such as disabilities or whether children were English learners. Reading and writing was ________according to children’s understanding of a range of different passages and genres.

________, girls were found to perform significantly better in reading and writing tests by fourth grade when compared with boys of the same age. As children progressed to eighth and twelfth grades, girls continued to ________ boys, but the difference was more noticeable in writing than reading. But what caused this difference in abilities? Evidence suggests ________ problems, such as being disruptive（扰乱性的） in class or being aggressive could be linked to neurological conditions. What is known as lateralization (偏侧化) could also play a role. Boys are believed to use one hemisphere when reading or writing, while girls appear to use both. The data did not, however, provide evidence to argue ________ the two genders having different learning styles.

Getting rid of dirt, in the opinion of most people, is a good thing. However, the attitudes to dirt are always changing.

In the early 16th century, people thought that dirt on the skin was a means to block out disease, and washing off dirt with hot water could open up the skin and let ills in. A particular danger was thought to lie in public baths. By 1538, the French king had closed the bath houses in his kingdom. The king of England did something similar in 1546. Thus began a long time when the rich and the poor in Europe lived with dirt in a friendly way. France’s Henry IV was famously dirty. Upon learning that a nobleman had taken a bath, the king ordered that, to avoid the attack of disease, the nobleman should not go out.

Though the belief above was long-lived, dirt has no longer been regarded as a nice neighbour ever since the 18th century. Scientifically speaking, cleaning away dirt is good to health. Clean water supply and hand washing are practical means of preventing disease. Yet, it seems that standards of cleanliness have moved beyond science since World War II. Advertisements repeatedly sell the idea; clothes need to be whiter than white, cloths ever softer, surfaces to shine. Has the hate for dirt, however, gone too far?

Attitudes to dirt still differ hugely nowadays. Many first-time parents nervously try to warn their children off touching dirt, which might be responsible for the spread of disease. On the contrary, Mary Ruebush, an American immunologist(免疫学家) , encourages children to play in the dirt to build up a strong immune system. And the latter position is gaining some ground.