Steven Stein likes to follow garbage trucks. His strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. What is even more interesting is that one of Stein's jobs is defending an industry behind the plastic shopping bag.

Americans use more than 100 billion thin film plastic bags every year. So many end up in tree branches or along highways that a growing number of cities do not allow them at checkouts(收银台) . The bags are prohibited in some 90 cities in California, including Los Angeles. Eyeing these headwinds, plastic-bag makers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume.

Among the bag makers' argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.

The industry has also taken aim at the product that has appeared as its replacement: reusable shopping bags. The stronger a reusable bag is, the longer its life and the more plastic-bag use it cancels out. However, longer-lasting reusable bags often require more energy to make. One study found that a cotton bag must be used at least 131 times to be better for the planet than plastic.

Environmentalists don't dispute(质疑) these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years.

1. What has Steven Stein been hired to do?

A. Help increase grocery sales.                          B. Recycle the waste material.

C. Stop things falling off trucks.                        D. Argue for the use of plastic bags.

2. What does the word “headwinds” in paragraph 2 refer to?

A. Bans on plastic bags.                                   B. Effects of city development.

C. Headaches caused by garbage.                       D. Plastic bags hung in trees.

3. What is a disadvantage of reusable bags according to plastic-bag makers?

A. They are quite expensive.                              B. Replacing them can be difficult.

C. They are less strong than plastic bags.             D. Producing them requires more energy.

4. What is the best title for the text?

A. Plastic, Paper or Neither.                              B. Industry, Pollution and Environment.

C. Recycle or Throw Away.                               D. Garbage Collection and Waste Control.[

Ways to sleep smarter

Studies show that poor sleep influences people to make good decisions, concentrate on tasks or even manage a friendly mood(情绪) at work.   36   Today we’ve got our top favorite sleep tips and facts.

Set a regular bedtime

  37   Choose a time when you normally feel tired. Try not to break this routine(惯例) on weekends when you will probably stay up late. If you want to change your bedtime, make the change gradually, such as 15 minutes earlier or later each day.

Eat the right food

Some foods are more helpful to a better night’s sleep than others.   38    Others like bananas, potatoes, and whole-wheat bread are also helpful.

  39__      

Exercising provides lots of good health benefits(好处). A good night’s sleep is one of them. But make sure you exercise in the morning or afternoon. The National Sleep Foundation reports that exercise in the morning or afternoon can help deepen sleep. However, those who worked out in the evening hours saw little or no improvement in their sleep.

Reduce(减少) screen time before bed

  40    A recent study shows that people who use electronic media(媒体) just before bedtime report lower-quality sleep even when they get as much sleep as those who don’t.

A. Avoid the alarm clock.

B. Exercise to improve sleep.

C. Try to solve problems in your sleep.

D. Go to bed at the same time every night.

E. There are many ways to increase the quality of your sleep.

F. Everybody knows that warm milk helps people sleep better.

G. Stop watching TV just before bedtime and you’ll sleep better.

We are forgetful. With time going by, our brains seem to be slowing down—and that can be a very unpleasant thing.     36     Read on for some techniques worth trying.

1.     37   

People who regularly made plans and looked forward to upcoming events had a 50 percent reduced chance of Alzheimer's disease (早老性痴呆症), according to a recent study. _   38    Something as simple as setting a goal to have a weekly coffee date with a friend will do. There's evidence that people who have a purpose in life or who are working on long or short-term goals appear to do better. In other words, keep your brain looking forward.

2. Go for a walk.

Mildly raised glucose (葡萄糖) levels can harm the area of the brain that helps you form memories and physical activity can help get blood glucose down to normal levels. In fact, exercise produces chemicals that are good for your brain.   39   

3. Learn something new.

Take a Spanish class online, join a drawing club, or learn to play cards. A study found that mental stimulation (刺激) limits the weakening effects of aging on memory and the mind. But the best thing for your brain is when you learn something new and are physically active at the same time.     40   . Or you can go dancing with your friends.

A. Focus on the future.      

B. This can be especially harmful to the aged.

C. It should be something like learning gardening.

D. So take a few minutes each day to do some reading.

E. But don't worry if your schedule isn't filled with life-changing events.

F. Luckily, research shows there is a lot you can do to avoid those moments.

G. In other words, when you take care of your body, you take care of your brain.

 ______ to sunlight for too much time will do harm to one's skin. 
    A. Exposed   B. Being exposed   C. Having exposed   D. After being exposed 

    Australia’s exercise guidelines have recently come as a shock to us. Not only are we being told we need to do a lot of more physical activity, but we’re also being urged to get out of our chairs----even if we do the right amount of exercise.

    The new guidelines focus not just on the exercise but on the amount of time we spend being sedentary(惯于久坐不动的). Sedentary behavior is the term to describe physically inactive tasks that don’t require lots of energy, basically sitting or sleeping. Activities are often measured in METs (Metabolic Equivalent of Task). Sedentary activities are in between 1 and 1.5 METs, walking at a moderate pace ranges from 3 to 3.5 and jogging is about 7.

    In recent years, a growing body of research has linked sedentary behaviour to obesity, type 2 diabetes, heart disease, some cancers. It’s considered such a risk that one US expert has gone so far as to suggest sitting for most of the day may be as dangerous to your health as smoking.

    Experts state we’re sedentary on average for 7 to 10 hours a day (this doesn’t include our time spent sleeping). Even if you are meeting, or exceeding (超过), the recommended 60 minutes a day of physical activity, you can still be considered sedentary.

    The guidelines don’t make any specific suggestions about how long you should sit for. Instead they say we should “minimize the amount of time spent in prolonged sitting” and “to break up long periods of sitting as often as possible. ”

28. From the passage we know that ___________.

     A. sedentary behavior is as dangerous to health as smoking

     B. sedentary behavior is likely to lead to some cancers

     C. we are sedentary for 7-10 hours a day in total

     D. we are healthy if we take one-hour physical activity a day.

29. Which way of behavior does the new guidelines advocate ?

    A. Stand up or take a short walk between sittings  

    B. Exercise less than 60 minutes a day

  C. Shorten the time of sleeping

    D. Stand for a long time a day

30. Where does this passage probably come from?

  A. Science fiction                                         B. A scientific paper

     C. An advertisement                                   D. A health report

Tony always works out development schemes faster than others. Is it _______he graduated from a top university ________ counts?

A. because, that      B. that, which

C. that; that         D. why, what

To be sure, only children﹙独生子女﹚experienced some things differently from those with sisters and brothers. Many feel more pressure to succeed. In the absence of brothers and sisters, only children also tend to look more exclusively to their parents as role models.﹙只以父母为楷模﹚

In India, 10-year-old Saviraj Sankpal founded a support group for the tiny minority of only children. Among other things, the group does volunteer work to counter ﹙反驳﹚the myth﹙不真实的说法﹚ that they are not responsible. “People think we’re treated too kindly and ruined,” says Sankpal, a computer engineering student. “But I’d like to remind them how lonely it can get.”

Most only children, however, say they wish for sisters or brothers only when it comes to caring for aging, unhealthy parents. Britain’s David Emerson, coauthor of the book The Only Child, says that such a person bears a terrible burden in having to make all the decisions alone. Emerson knows from experience: After his father died, he chose to move his elderly mother from their family home, where she was vulnerable(易受攻击的) to house breakers, to a new one with more security﹙安全﹚. “The move was quite hard on her, and she might feel that I pushed her into it,” he says. “After all, I am left with that responsibility.” ﹙责无旁贷﹚

In the future, more and more only children will likely face similar choices. With working mothers increasingly the rule, many families are finding they simply don’t have the time, money or energy to have more than one child. As only children become common, perhaps the world will realize that the charge made against them is unjust.

39. It can be inferred from the passage that the author’s attitude towards only children is 　      　　. 

A. critical﹙批评的﹚ B. objective﹙反对的﹚C. hostile﹙不友善的﹚D. unjust﹙不公正的﹚

40. It can be inferred from the passage that only children’s parents should 　      　　. 

A. find a support group for their only children

B. do volunteer work to help their only children

C. let their only children make all the decision alone

D. set good examples for their only children

41. Emerson decided to move his elderly mother to a new house because he 　      　　. 

A. is the only one who cares about her

B. doesn’t want to leave her alone

C. wants to share the responsibility with her

D. is worried about her safety

42. It is quite usual now for a working mother to 　　　. 

A. spend all her time and money on her only child

B. be responsible for bringing up her only child

C. have and bring up only one child

D. devote all her energy to her job

 ---Are you pleased with what he has done?

---It couldn’t be _______. Why didn’t he put more effort into his work?

A. any worse             B. much better

C. so bad                D. the best

Many Chinese kids, known as "left-behind" children, hardly ever see their parents, because their parents are migrant(移民)workers.
    Li Ling, 11, is a left-behind child. Her parents have been working in Zhejiang for 10 years, while she lives with her grandparents in Guangdong. She was reunited with her parents last Spring Festival. As the number of migrant workers in China increases, the number of left-behind children is rising fast. Li is one of the 61. 02 million left-behind children under 17. They account for 37.7 percent of rural children and 21.88 percent of all Chinese children.
    “The large number of left-behind children has already become a social issue. If left unsolved, it will cause serious problems,” Wang Zhenyao, director of the China Philanthropy Research Institute, told China Daily. The education level of adults supervising（监管） these children is generally not that high. They can only take care of the children's personal safety and daily living, being unable to care for their educational and spiritual needs. Meanwhile, the absence of parental support will make some left-behind children lack self-confidence. They may be slower in physical and emotional growth than their peers. Others may even become "problem youths".
   To solve this problem, the government is taking action. For instance, 30 provinces and cities have allowed certain children to attend school and take the college entrance exam in the city where their parents are. However, Wang suggested that the country do more, such as making policies encouraging migrant workers to work in their home towns. He also said that a well-balanced child welfare system is needed. "These children are the future of the nation, so they deserve our loving care and protection," Wang said.
28. Left-behind kids hardly see their parents because _______.

A．they are poor and in rural areas

B．they are brought up by their grandparents

C．their parents are making a living in other cities

D．their parents don't go back home on Spring Festival

29. Which of the following is true according to the passage?

A．Li Ling hasn't seen her parents for about 10 years.

B．Left-behind children have become problem youths.

C．There are 61. 02 million left-behind children in China.

D．Much remains to be done to settle the left-behind kids issue.

30. The purpose of the passage is _______.

A．to criticize the migrant workers who leave their children at home

B．to focus on the present situation of the left-behind children

C．to worry about the present situation of left-behind children

D．to call on the government to educate the migrant workers

31. In which column of a newspaper can we most probably find this passage?

A．Education.   B．Society. C．Entertainment.   D．Employment. 

0ne  day we will manage to    the world     this  terrible  disease-cancer.

   A. get rid； of   B. refer； to    C.    rid；   of   D. treat; to

56.   The second question was so difficult that I didn’t even a___________ it.

57.   But it was e__________ that ideas were changing in the 13^th century.

58.   There is no need to feel a____________ if you don’t make it. Just keep trying!

59.   It is the m______________ addiction rather than physical effects that makes it really difficult to stop smoking.

60.   Running a marathon will leave you b_____________.

61.   We care more about quality than ____________________(数量).

62.   They said that the painters were careless and the paintings were _________________(可笑的)

63.   What would you rather do---- paints pictures, make ______________(雕塑)，or design buildings?

64.   Others think that it will help them to deal with their ____________(压力).

65.   It is the burning of more and more fossil _________________(燃料)that has resulted this increase in CO2.

文中共有10处语言错误，每句中错误涉及一个单词的增加、删除或修改。

增加： 在缺词处加一个漏字符号（/\），并在其下面写出该加的词。

删除： 把多余的词用（\）划掉。

修改： 在错的词下划一横线，并在该词下面写出修改的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

Dear the teachers and schoolmates, it's a great honor for me to be here today and share my experiences of learning English with you．I want to learn English good to take a good job, so I learn English in some difference ways．In class, I learn new words, useful expressions and grammar and take efforts to understand the texts under the help of our English teacher. After class, you do a lot of exercises prepare for the college entrance examination．I also read news and watch videos on the Internet and from other source．I have a lot of fun especial when learning English with cartoon movies．

Winter city breaks in Europe: readers' tips

     Snow and ice is a strong characteristic in our readers' winter break tips, but it's not a complete white-out; your body temperature will be lifted by gingerbread and chestnuts everywhere.

    Winning tip: Bolzano, Italy

    The buildings are as gothic and spiky as anything across the Austrian border in this 25% German-speaking town, the largest in South Tirol. It's known as the Christmas Capital of Italy: it's snowy in winter, and the Germanic influence means there are Christmas markets and gingerbread everywhere. And there are other wintry things on offer if the markets and mulled wine aren't enough, including several cable cars running into the hills, taking you up to walks in the Renon hills (also known as the Ritten) and views of the Dolomites and the world-famous Ötzi the Iceman, sealed (密封) in ice in about 3,300BC, discovered in 1991 and on show in the South Tyrol Museum of Archaeology.

    Ice skating in Red Square, Moscow

     There's nothing quite like celebrating Christmas in a country that once banned it. New Year is Russia's biggest holiday, but you don't have to wait until 31 December to go ice skating in Red Square. The famous skating spot is open from November 30 until March 9—and return flights from Gatwick to Moscow with EasyJet cost little more than ￡100 at present. After your festive skate, warm up with a hot chocolate and a walk around GUM: once a state department store, now home to popular stores and cafes.

21．Where is Ötzi the Iceman?

A．On a hill.

B．In a museum.

C．On a square.

D．In a department store.

22．What is typical of Russian celebration of New Year?

A．Christmas markets.

B．Mulled wine.

C．Walks in the hills.

D．Ice skating.

23．In which section can you read this text?

A．Environment.

B．Business.

C．Travel.

D．Lifestyle.

What were you doing before you started reading this? Were you fully focused on another article? Or eating breakfast? Organizing your day? Or were you staring out of the window, feeling restless and bored?

       It is likely to have been the latter. Brief moments of boredom are universal, and are frequently what drives us to stop what we are doing and move to something that we hope will be more exciting.

       But although boredom is common, it is neither unimportant nor favorable, according to Dr John Eastwood, a psychologist at York University, Toronto. Eastwood is the joint author of The Unengaged Mind, a major new paper on the theory of boredom.

       Boredom, he points out in the paper, has been connected with overeating, depression, anxiety, and an increased risk of making mistakes. Mistakes at work might not be a matter of life and death for most of us, but if you are an air traffic controller, pilot or nuclear power plant operator, they most certainly can be.

       However, Dr Esther Priyadharshini, a senior lecturer in education at the university of East Anglia, has studied boredom and says it can be seen in a positive light. “We can’t prevent boredom—it’s an unavoidable human emotion. We have to accept it and find ways to control it. We all need downtime. There’s no need to be fully busy with work at all times.” she says.

       Children who complain that they have nothing to do on rainy holidays may try to find other things to focus on. The artist Grayson Perry has reportedly spoken of how long periods of boredom in childhood may have improved his creativity.

       “We all need vacant time to mull(深思熟虑)things over,” says Priyadharshini.

32.  We can learn from Eastwood that _______.

       A. boredom can be potentially (潜在地) dangerous     B. air traffic controllers usually feel bored

       C. brief moments of boredom are not common           D. making mistakes is a major cause of boredom

33. The study mentioned by Franks shows that ______.

       A. pilots need to be alert for landing and takeoff          B. pilots must work well together when flying

       C. boredom can make pilots lose attention                  D. flying a plane is generally quite fun

34.  Which of the following might be Perry’s opinion on boredom?

       A. It often leads to failure.                                        B. It has a beneficial effect.

       C. It is more likely to happen to children.                   D. It makes children lose interest in learning.

35. What is the best title for the text?

       A. Why am I so bored?                                            B. Is boredom bad for you?

       C. Can I have your attention?                                    D. How can I get rid of boredom?

        Each year, millions of people go abroad to work, study, or travel. It's a great way to find out what life is like in another part of the world! You're probably hoping to make new friends and learn about the culture in your host country everything from attitudes and beliefs to social customs and popular foods. But constantly having to deal with new situations can be frustrating, even stressful.

        Homesickness, stress, fear, and confusion are all symptoms of "culture shock." At first, you may feel like getting on the plane and heading home. It's OK to have those feelings, but the following are some tips to help you handle the challenges that you will face.

        Don't expect to be perfect. You may feel frustrated that you have culture shock, especially since you probably spent so much time preparing for your trip. No matter how much information you read, or how well you speak the host language, it is natural to feel overwhelmed sometimes. If you give yourself some time, things will gradually get easier.

        Have an open mind. While it's certainly OK to feel frustration or confusion in your new surroundings, try not to form an opinion about the new culture too soon. Don't think of the host culture as better or worse, just different-you'll be more willing to try new things.

        Participate. This is obvious, but everybody needs to be reminded. Just watching life go on around you isn't good enough. You really need to try things for yourself. Don't worry about making a mistake; people in your host country will generally be very understanding and willing to help if you have questions.

        Your study abroad experience is a unique and special time in your life, one that you'll never forget. If you follow our suggestions, you'll be able to handle it well, and have a wonderful time. Good luck!

31. What is culture shock?

      A. Something you feel surprised at.

      B. The problems you have when you go to another country.

      C. The frightening feelings you have.

      D. Something different from your own culture.

32. Which one doesn't belong to culture shock?

      A. Homesickness.          B. Stress.                      C. Fear.                        D. Sleepless.

33. What should you do when you feel depressed?

      A. Go back to your own homeland.          B. Talk to someone about your problem.

      C. Give yourself some time to get used to it.  D. Stop thinking of it.

34. Which of the following statements is wrong?

      A. It is natural to feel overwhelmed sometimes. 

B. Not everything is perfect.

      C. Try to form the opinion about the new culture as soon as possible.

      D. Tell others about your problems.

35. What is the main idea of this article?

      A. How to overcome culture shock?    B. Why do people have culture shock?

      C. Who might have culture shock?     D. When will you have culture shock?

 The play, _____ style is quite formal, is typical of the period.

A. whose        B. which              C. that               D. what

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

注意：1．每处错误及其修改均仅限一词；2．只允许修改10处，多者(从第11处起)不计分。

I have just moved to the house in Bridge Street. Yesterday a beggar knocked at my door. He asked from me for a meal and a glass of beer. In return for this, the beggar stood on one’s head and sang a song happy. I gave a meal to him. He ate the food and drank the beers. Then he puts a piece of cheese in his pocket and went away. Lately a neighbour told me about him. Everybody knows him. He name is Percy Buttons. He calls every house in the street once a month but always asks for a meal and a glass of beer. 

            Being Left-handed in a Right-handed World

The world is designed for right-handed people, but why does a tenth of the population prefer the left?  31 

The answer to it remains a bit of a mystery. Since scientists have noticed that left-handedness tends to run in families, it's assumed that left-handedness has a genetic（基因的）component to it.   32   . In fact, identical twins, who share the same genes, can sometimes prefer to use different hands. There are also plenty of theories on what else might determine which hand you write with, but many experts believe that it's kind of random.

Historically, the left side and left-handedness have been considered a negative thing by many cultures.   33   In some areas, the left hand became known as the "unclean" hand. In many religions, the right hand of God is the favored hand. For example, Jesus sits at God's right side. God's left hand, however, is the hand of judgment. Various activities and experiences become rude or even signs of bad luck when the left hand becomes involved. In some parts of Scotland, it is considered bad luck to meet a left-handed person at the start of a journey.   34   A person giving directions will put their left hand behind them and even physically try to point with their right hand if necessary. In some Asian countries, eating with the left hand is considered impolite.

 __ 35    People come to realize that left-handedness is natural. People even noticed that many famous people are left-handed, including Benjamin Franklin, Leonardo Da Vinci, and Charlie Chaplin. Some researchers find out that lefties are more creative and can deal with abstract thinking better. The left-handedness is more easily adaptable to the right-handed world as well. Being left-handed is no longer a sad story now; instead, it is a wonderful gift or maybe it is something you should take pride in.

A. In other words, left-handers are born that way.

B. Left-handedness used to be regarded as a disability.

C. The unfavorable associations of the use of the left hand among cultures are varied.

D. Why do they prefer to use their left hand rather than their right hand for routine activities?

E. Why do some parents force their left-handed children to become right-handed when writing?

F. In Ghana, pointing, gesturing, giving or receiving items with the left hand is considered rude.

G. Fortunately, nowadays most societies and cultures no longer reject left-handedness like  

  before.

From the health point of view we are living in a marvelous age. We are immunized (免疫) from birth against many of the most dangerous diseases. A large number of once deadly illnesses can now be cured by modern drugs and medical treatment. It is almost certain that one day cures will be found for the most stubborn remaining diseases. The expectation of life has increased enormously. But though the possibility of living a long and happy life is greater than ever before, every day we witness the unbelievable slaughter ( 屠杀) of men, women and children on the roads. Man vs the motor-car! It is a never-ending battle which man is losing. Thousands of people the world over are killed or horribly killed each year and we are quietly sitting back and letting it happen.

It has been rightly said that when a man is sitting behind a steering wheel (方向盘), his car becomes the extension of his personality. There is no doubt that the motor-car often brings out a man’s very worst qualities. People who are normally quiet and pleasant may become unrecognizable when they are behind a steering-wheel. They are il l-mannered and aggressive, willful as two-year-olds and absolutely selfish. All their hidden disappointments and regrets seem to be brought by the act of driving.

The surprising thing is that society smiles so kindly on the motorist and seems to forgive his behavior. Everything is done for his convenience. Cities are allowed to become almost impossible to live in because of heavy traffic; towns are made ugly by huge car parks; the countryside is ruined by road networks; and the mass annual slaughter becomes nothing more than a statistic, to be conveniently forgotten.

It is high time a world system of laws were created to reduce this senseless waste of human life. As for driving, the laws of some countries are not strict and even the strictest are not strict enough. Here are a few examples of some the things that might be done. The driving test should be standardized and made far more difficult than it is; all the drivers should be made to take a test every three years or so; the age at which young people are allowed to drive any vehicle should be raised to at least 21; all vehicles should be put through strict annual tests for safety. Even the smallest amount of alcohol in the blood can affect a person’s driving ability. Present drinking and driving laws (where they exist) should be made much stricter. Maximum and minimum speed limits should be introduced on all roads.

Governments should lay down safety specifications (规范) for manufacturers, as has been done in the USA. All advertising stressing power and performance should be banned. These measures may sound inordinately severe. But surely nothing should be considered as too severe if it results in reducing the annual toll of human life. After all, the world is for human beings, not motor-cars.

48．The main idea of this passage is _________.

A.traffic accidents are mainly caused by motorists

B.thousands of people the world over are killed each year

C.the laws of some countries about driving are not too strict

D.only stricter traffic laws can prevent accidents

49．What does the author think of society toward motorists?

A.Society laughs at the motorists.

B.Huge car parks are built in the cities and towns.

C.Victims of accidents are nothing.

D.Society forgives their rude driving.

50．Why does the author say: “his car becomes the extension of his personality?”

A.Driving can show his real self.

B.Driving can show the other part of his personality.

C.Driving can bring out his character.

D.His car can express his temper.

51．The attitude of the author is _________.

Speaking two languages can actually help offset(抵消) some effects of aging on the brain, a new study has found.

Researchers tested how long it took participants to switch from one cognitive(认知的) task to another, something that is known to take longer for older adults, said lead researcher, Brian Gold, a neuroscientist at the University of Kentucky.

Gold’s team compared task-switching speeds for younger and older adults, knowing they would find slower speeds in the older population because of previous studies. However, they found that older adults who spoke two languages were able to switch mental activities faster than those who didn’t. The study only looked at life- long bilinguals(会说两种语言的人), defined in study as people speaking a second language daily since they were at least 10 years old.

Gold and his team asked 30 people, either bilingual or monolingual(只懂一种语言人) , to have a series of tests. They found that bilingual people were not only able to switch tasks faster they had different brain activity than their monolingual peers.

Kristina called bilingualism “a beautiful natural experiment”, because people grow up speaking two languages, and studies have shown that they get certain cognitive benefits from switching between languages and determining which to respond with based on what's going on around them.

Gold said he grew up in Montreal, where he spoke French at school and English at home, prompting relatives to question whether his French language immersion would somehow hinder(阻碍) his ability to learn English.

“Until very recently, learning a second language in childhood was thought of as dangerous,” he said. “Actually, it's beneficial.”
21. What-s the main idea of the passage?

22. Which of the following is TRUE according to the passage?

23.Kristina called bilingualism “a beautiful natural experiment” because

24. We can learn from the last paragraph that learning a second language in childhood is________.