2020最新高中英语 课时分层作业7 Unit 12 Culture Shock Section Ⅰ、Ⅱ 北师大版必备4
课时分层作业(七) Section Ⅰ、Ⅱ[语言知识练习固基础]Ⅰ.语境填词A)根据汉语或首字母提示，写出所缺单词1．We students should often exchange(交换) ideas with our parents，who are rich in experience.2．Please give him lots of love instead of high expectations(期望)；otherwise he will be loaded with great pressure.3．I think you should make an apology to your brother for being so rude to him.4．The video was totally absorbing the children's attention.5．There are more than 42 countries where the majority of the people speak English.B)填写空白处所需要的内容(1个单词)或所提供单词的正确形式6．I owe my success to my teachers.7．Tom is busy writing(write)a new novel.8．Even though/if we achieve great success in our work，we should not be proud.9．I wish that someday I could/would live(live) on the moon.10．All singers kept together.As a result，their performance was successful.Ⅱ.单句改错1．The majority of students finds it quite hard to understand their new teacher.finds→find 2．I haven't got used to live on my own so far.live→living 3．When he came back three hours later，they were still sitting on the sofa，absorbing in conversation.absorbing→absorbed 4．I must make apology to you for my being late.make后加an 5．I am busy in my work，so I can't have lunch with you.in→with[高考题型练习提能力]Ⅰ.阅读理解A PURRFECT ANSWERAs a kindergarten teacher，I work with students of different readingabilities.One day，I was helping a student who was struggling to learn the letter sounds.I used flash cards with letters and pictures to help.I showed him the letters and a picture of a snake to call attention to the sound.Sss，snake.Next came the letter c．He couldn't remember the sound，so I showed him a picture of a cat.When I asked him to tell me the sound of c，he looked puzzled and said，“Meow？”PIANO WOMANWhen I saved a piano from an old house，I had not considered that I would need assistance moving it from the back of my pickup truck into my home.Finally，I had to drive around with it for several days.One day，a police officer pulled me over.He had seen me before and asked why I was driving around with a piano in my truck bed.I told him that my car radio had broken and I couldn't afford a new one.He laughed －and he let me go without a ticket.SEE DAD RUNLike most dads，I imagine，I'd always assumed that my threeyearold son looked up to me as a superhero.Until one day，that is，when，having picked him up from school，I saw that we were about to miss our bus and decided to make a run for it.Once we were safely aboard，I noticed that my son was staring at me with his big blue eyes.“What's the matter？”I asked him，still out of breath.He whispered，“Daddy，I didn't know you could run.”After moving to the country，my threeyearold daughter and I were often alone in our house.Because we lived in a rural area with no close neighbors，I wanted to make sure she would be able to call 911 in the event that something happened to me.After instructing her，I decided to test her：“OK，what would you do if you found me on the floor and you couldn't wake me up？”I could see her little brain working.To my surprise，she said，“I would go into the kit chen and eat anything I want.”【语篇解读】作者讲述了几个出人意料，幽默回答，让人发笑的故事。
1．Why did the police officer laugh and let the woman go without a ticket?A．Because the woman didn't break any traffic rules on purpose that day.B．Because the woman was wise enough to give him appropriate explanations.C．Because the police officer was so kind and friendly that he wanted to help her.D．Because the police officer had seen the woman for several times before.B[推理判断题。
根据女士的回答I told him that my car radio had broken and I couldn't afford a new one.可知，是因为她机智幽默的回答给了警察一个合理的解释，所以警察让她没有票就走了。
故选B。
]2．Which of the following is the most suitable to be put in the blank of the text?A．CLOSE NEIGHBORSB．YOUNG DAUGHTERC．SNACK EMERGENCYD．CALL 911HELPC[推理判断题。
根据段中call 911 in the event that something happened to me 和go into the kitchen and eat anything I want.可知，作者想教给孩子紧急情况下拨打911，但孩子却想趁母亲倒地时去厨房吃东西。
SNACK EMERGENCY概括出了本段的关键词，故选C。
]3．What do you think of the stories?A．Fun. B．Caring.C．Confusing. D．Amazing.A[推理判断题。
作者讲述的这几个故事都有出人意料，幽默的回答，让人发笑。
这几个故事都是有趣的，故选A。
]Ⅱ.阅读七选五How to Celebrate ThanksgivingCelebrated yearly on the fourth Thursday in November，the holiday of Thanksgiving was first observed (庆祝) in 1621 and continues to be an American tradition today.1 ．1．Make the table merry. 2 ．If not，lay out the food somewhere readily reachable on the day.Get the kids to help set the table，which is regarded as part of their contribution to the preparations.2． 3 ．There are a few traditions connected with Thanksgiving that are enjoyed in many families，such as gathering around the TV and watching football games or watching the Macy's Thanksgiving Day Parade on TV with the kids.3．Spend a little time thinking the meaning of Thanksgiving.Thanksgiving is achance for many families to spend time together after being apart for much of the year. 4 ．Think of your family's own ways to express your appreciation (感激) on this day and in the following year.4． 5 ．Offer to help prepare meals at a homeless shelter，and start food or clothing donation (捐赠)．This can be an important part of teaching your children about gratitude in action.A．Take a long nap after the meal if you're feeling sleepyB．Consider helping the less fortunate during ThanksgivingC．Enjoy some traditional activities in Thanksgiving holidayD．It is a good time to think the love that you have for one anotherE．If you want to know how to celebrate Thanksgiving，just follow these steps F．Here are some things you'll have to do to prepare the food for your holiday G．Arrange the table decorations the day before Thanksgiving if you have a separate dining table【语篇解读】文章介绍了庆祝感恩节的一些步骤。
北师大版高中英语必修四Unit 12《Culture Shock》ppt研习考点课件
(2)He ________ his success ________hard work. 他的成功是靠勤奋工作换来的。 (3)The game was put off ________ ________ the rain. 比赛因下雨而推迟了。
答案：(1)owes；to (2)owes；to (3)owing to
(3)sb.be familiar with sb.某人与某人亲密无间 familiarity n．精通；熟悉；亲切 familiarize vt.使精通；使通晓 unfamiliar adj.不熟悉的；不精通的 [以练促记 1] (1)The song ______ ______ ______ me. 这首歌我听起来很熟悉。 (2)I_____ _____ ______ ______ electrical engineering. 我对电气工程不太熟悉。
(3)glare 常为不及物动词(＋at)指“瞪着眼看，怒目而 视”。 She rose, glaring at me. 她站起来瞪着我。 (4)stare 常为不及物动词(＋at)指“长时间(目不转睛地) 盯着„„看，凝视”。 The man stared me up and down. 那人从头到脚盯着我看。
(2)on the other hand 是为了说明同一问题的另一方 面。如： The job wasn’t very interesting，but on the other hand，it was wellpaid. 那个工作没多大意思，不过，工资却很高。
(3)in contrast 用于两件对立的事实，但指出两者的差 异处。如： It was cold yesterday，but in contrast it’s very hot today. 昨天很冷，但今天很热。
2020学年高中英语 课时分层作业9 Unit 12 Culture Shock Section Ⅴ、Ⅵ 北师大版必修4
课时分层作业(九) Section Ⅴ、Ⅵ[语言知识练习固基础]Ⅰ.语境填词A)根据汉语或首字母提示，写出所缺单词1．We've grown very attached(留恋) to this house and would hate to move.2．What you have done is contrary(与……相反) to the doctor's advice.3．No one is sure who the dictionary belongs to.4．The ice is too thin to bear your weight.5．I cannot forgive myself for not taking care of my mother when she was ill.B)填写空白处所需要的内容(1个单词)或所提供单词的正确形式6．Make sure that you are sensitive to her feelings.7．The advice is that the composition (should)be written (write) on one side only.8．They can not help to clean(clean) the classroom，because they haven't finished their work.9．I quit.That is because I want to try something different.10．At school，some students are active while some are shy，yet they can be good friends with one another.Ⅱ.单句改错1．In addition to，there was a pint of yellow wine.去掉to2．He was hit by a falling tree and killed to the spot.to→on3．Scientists have been attaching much value to explore the moon.explore→exploring4．Please forgive me phoning you so late.me→my或me后加for5．China is a developing country belongs to the third world.belongs→belonging或belongs前加which[高考题型练习提能力]Ⅰ.阅读理解ACulture shock or thinking differences can depress even the most experienced traveller.Remember that unlucky accidents with service providers may take place because of cultural or linguistic misunderstandings，and that getting angry will make communication more difficult and cause bad feelings.A taste of humour can make hard situations more meaningful and enjoyable to you，your fellow travellers and the local friends you've made.Keep a journal or carry a small tape recorder and make regular entries or recordings.Taking a step back and telling an experience after some time will open the door to humour.Write a letter or ema il to a friend when you find your humour reducing.Challenge yourself to tell at least one good story in this message and you'll be surprised how funny things can look when told to someone outside the situation.Keep a list of funny things that you observe during your first few days in a new culture，and an explanation of what you think these things are allabout.Look back on these lists later in the trip；what seemed strange before is probably familiar now，and your explanations may be funnier than the things themselves！Imagine writing an entry in a guidebook about a frustrating experience.How would you describe your experience to the later travellers？What travel advice would you offer?Try to see yourself through the eyes of locals.What might they find strange，funny about what you are doing at this moment？When you find it difficult to overcome cultural differences，taking a new look at yourself can be very funny.Be careful not to sacrifice (牺牲) respect for local culture in order to lighten things up for yourself and fellow travellers.【语篇解读】幽默可以使由于文化差异而给旅行者造成的不良情形得以改观，本文给那些要旅游而且希望变得幽默的人提出了3条建议。
【2020】最新高中英语课时分层作业8Unit12CultureShockSectionⅢ、Ⅳ北师大版必修4
4．When his brother was to cross the street，he was knocked down by a truck and badlyinjured．
C．After dinner，you'd better leave in half an hour.
D．After dinner，use napkin to clean your mouth.
A[细节理解题。根据文章最后一段中的“And your friend will be pleased if you leave in half an hour or so.”可知，半个小时后离开，你的朋友会很高兴。而不是待很长的时间。故选A。其他与文章内容一致。]
It is not the same with every westerner，and some take16than others to go through the three stages.It all depends on how17you are and how tightly you18to your own culture.It took over a year of living in China19I finally appreciate the new culture.Now，I'm more20in China than in my own country.
9．Do you think you have no doubt of hisarrival(arrive) on time?
2020高中英语 课时分层作业8 Unit 12 Culture Shock Section Ⅲ、Ⅳ 北师大版必修4
课时分层作业(八) Section Ⅲ、Ⅳ[语言知识练习固基础]Ⅰ.语境填词A)根据汉语或首字母提示，写出所缺单词1．There is no greater pleasure than lying on my back in the middle of the grassland，staring(凝视) at the night sky.2．When I entered the classroom，I felt that everyone was whispering(低声说) about me.3．Don't respond to any emails requesting personal information，no matter how official they look.4．When his brother was to cross the street，he was knocked down by a truck and badly injured．5．In order to get familiar with the new neighbour，I decided to call at his house.B)填写空白处所需要的内容(1个单词)或所提供单词的正确形式6．It's bad manners(manner) to ask other's salary if you are not very familiar.7．I've always been very cautious about/of giving my address to strangers because I do everything with caution.8．You can hardly imagine the great difficulty I had looking(look) after the noisy children.9．Do you think you have no doubt of his arrival(arrive) on time?10．The hospital has recently obtained new medical equipment，allowing(allow) more patients to be treated.Ⅱ.单句改错1．I stopped and he asked me for lift.lift前加a 2．He requested that she was dismissed.was→be 3．We had just covered less than 20 miles while we were stuck in the storm.while→when 4．To return to the problem of water pollution，I'd like you to look at a study having conducted in Australia in 2012.去掉having 5．There was no one nearby who might see him trying to break in the house.in→into[高考题型练习提能力]Ⅰ.阅读理解We know the westerners like to plan for their time carefully in order to do all the things that are important to them.So if your American or English friend asks you to dinner，he usually invites you a week ahead.But if you really have no time and can't go to the dinner，you can ring him to saysorry.The dinner is usually served at home，sometimes at a restaurant.You should get there on time，and don't forget to put on your fine clothes.It is also a good idea to take some little presents to your friend，such as flowers，chocolates and so on.When you are at dinner，you should also observe(遵守) some other customs.Here I'll give you some do's and don'ts about them：1．Don't leave bones on the table or the floor.(You should put them on your plate with fingers.) 2．Don't use your bowl to drink soup，but use your spoon to help you instead.3．Don't talk with much food in your mouth.4．Don't ask others to have more wine.(This is quite different from that in China.)5．After dinner，use your napkin (餐巾) to clean your mouth and hands.6．Make sure small pieces of food are not left on your face.Then after dinner，you can stay there a little time.And your friend will be pleased if you leave in half an hour or so.Next day，you had better ring him up to thank him for the good dinner.【语篇解读】本文是一篇说明文。
2020高中英语 Unit 12 Culture Shock Section Ⅶ Writing——私人信件学案 北师大版必修4
Section ⅦWriting——私人信件[写作技法指导][文体指导]英文信件的写法在许多方面与中文信件不同，下面我们简单介绍一下英文信件的格式和写法。
一、信封的格式1．写信人的姓名、地址写在信封正面的左上角。
2．收信人的姓名、地址写在信封正面中央稍偏右的地方。
3．邮票贴在信封的右上角。
4．地址的写法是先写收信人，然后按照从小到大顺序依次写出门牌号、街道、城市、省或州名、邮编，最后写国名。
5．收信人名前应根据需要加：Mr.(先生)、Mrs.(太太、夫人)、Miss(小姐)、Ms(女士，已婚或未婚均可)、Dr(博士)、Prof(教授)等称呼，以示礼貌，而不用“teacher”作为称呼。
男老师我们可以用Mr.，女老师我们用Mrs.，Miss或Ms作为称呼。
二、正文的格式1．称呼一般以“Dear...”开头，后面用逗号，不能用冒号。
2．书信正文从称呼下一行的3至5个字母开始。
3．如同中文信一样，英文信的结尾也常写有“祝好”、“盼来信”、“代向……问好”之类的话，我们称之为“结束语”。
4．在信的结尾下面签上自己的姓名。
除了对熟人或亲密的人以外，签名必须写全姓名，而且不管什么信件，都应由写信人亲笔签名。
[亮点句式]1．开头语经典例句①I am very glad to hear from you.②Thank you for your letter.③I was very pleased (happy/glad) to receive your letter of February 6，2016.④Your letter of February 6，2016 has been received.2．结束语经典例句①I hope to have a letter from you before long.②Please write to me soon and tell me all about yourself.③I'm looking forward to your reply.3．签名时的经典用语英文信签名时常用的词语：Yours，Yours truly，Yours sincerely，Yours ever等。
高中英语 课时作业20 Unit 12 Culture Shock Grammar课件 北师大版必
his report on schedule.
6．By eating (eat) more fast food people will get more salt and
Form study group. Get students together who want to do well in class. Make sure that everyone is familiar with the material because you do not want to spend time re－teaching material to people who do not understand it. 5 Sometimes group sessions (分组会话) can become chatting sessions.
复习课件
高中英语 课时作业20 Unit 12 Culture Shock Grammar课件 北师大版必修4
课时作业20 Grammar
Ⅰ.单句语法填空 1．I had as much fun sailing the seas as I now do working (work)
with students. 2．The cooling wind swept through out bedroom windows,
10．I look forward to see her again in the near future. see→seeing
Ⅲ.完成句子 1．He hurried to the school, only to find nobody was there. 他匆匆忙忙赶到学校，结果发现空无一人。 2．It remains to be seen whether Jim will be fit enough to play in the final. 吉姆是否适合打决赛还要再看一看。 3．The meeting to be held tomorrow is of great importance. 明天要举行的会议很重要。 4．Having tried many times, he failed to reach his goal in the end. 试了很多次，最后他还是没能实现目标。
高中英语 课时分层作业8 Unit 12 Culture Shock Section Ⅲ、Ⅳ 北师大版必修4
课时分层作业(八) Section Ⅲ、Ⅳ[语言知识练习固基础]Ⅰ.语境填词A)根据汉语或首字母提示，写出所缺单词1．There is no greater pleasure than lying on my back in the middle of the grassland，staring(凝视) at the night sky.2．When I entered the classroom，I felt that everyone was whispering(低声说) about me.3．Don't respond to any emails requesting personal information，no matter how official they look.4．When his brother was to cross the street，he was knocked down by a truck and badly injured．5．In order to get familiar with the new neighbour，I decided to call at his house.B)填写空白处所需要的内容(1个单词)或所提供单词的正确形式6．It's bad manners(manner) to ask other's salary if you are not very familiar.7．I've always been very cautious about/of giving my address to strangers because I do everything with caution.8．You can hardly imagine the great difficulty I had looking(look) after the noisy children.9．Do you think you have no doubt of his arrival(arrive) on time?10．The hospital has recently obtained new medical equipment，allowing(allow) more patients to be treated.Ⅱ.单句改错1．I stopped and he asked me for lift.lift前加a 2．He requested that she was dismissed.was→be 3．We had just covered less than 20 miles while we were stuck in the storm.while→when4．To return to the problem of water pollution，I'd like you to look at a study having conducted in Australia in 2012.去掉having 5．There was no one nearby who might see him trying to break in the house.in→into[高考题型练习提能力]Ⅰ.阅读理解We know the westerners like to plan for their time carefully in order to do all the things that are important to them.So if your American or English friend asks you to dinner，he usually invites you a week ahead.But if you really have no time and can't go to the dinner，you can ring him to say sorry.The dinner is usually served at home，sometimes at a restaurant.You should get there on time，and don't forget to put on your fine clothes.It is also a good idea to take some little presents to your friend，such as flowers，chocolates and so on.When you are at dinner，you should also observe(遵守) some other customs.Here I'll give you some do's and don'ts about them：1．Don't leave bones on the table or the floor.(You should put them on your plate with fingers.)2．Don't use your bowl to drink soup，but use your spoon to help you instead.3．Don't talk with much food in your mouth.4．Don't ask others to have more wine.(This is quite different from that in China.)5．After dinner，use your napkin (餐巾) to clean your mouth and hands.6．Make sure small pieces of food are not left on your face.Then after dinner，you can stay there a little time.And your friend will be pleased if you leave in half an hour or so.Next day，you had better ring him up to thank him for the good dinner.【语篇解读】本文是一篇说明文。
2020高中英语 课时分层作业9 Unit 12 Culture Shock Section Ⅴ、Ⅵ 北师大版必修4
课时分层作业(九) Section Ⅴ、Ⅵ[语言知识练习固基础]Ⅰ.语境填词A)根据汉语或首字母提示，写出所缺单词1．We've grown very attached(留恋) to this house and would hate to move.2．What you have done is contrary(与……相反) to the doctor's advice.3．No one is sure who the dictionary belongs to.4．The ice is too thin to bear your weight.5．I cannot forgive myself for not taking care of my mother when she was ill.B)填写空白处所需要的内容(1个单词)或所提供单词的正确形式6．Make sure that you are sensitive to her feelings.7．The advice is that the composition (should)be written (write) on one side only.8．They can not help to clean(clean) the classroom，because they haven't finished their work.9．I quit.That is because I want to try something different.10．At school，some students are active while some are shy，yet they can be good friends with one another.Ⅱ.单句改错1．In addition to，there was a pint of yellow wine.去掉to 2．He was hit by a falling tree and killed to the spot.to→on 3．Scientists have been attaching much value to explore the moon.explore→exploring 4．Please forgive me phoning you so late.me→my或me后加for 5．China is a developing country belongs to the third world.belongs→belonging或belongs前加which[高考题型练习提能力]Ⅰ.阅读理解ACulture shock or thinking differences can depress even the most experienced traveller.Remember that unlucky accidents with service providers may take place because of cultural or linguistic misunderstandings，and that getting angry will make communication more difficult and cause bad feelings.A taste of humour can make hard situations more meaningful and enjoyable to you，your fellowtravellers and the local friends you've made.Keep a journal or carry a small tape recorder and make regular entries or recordings.Taking a step back and telling an experienc e after some time will open the door to humour.Write a letter or em ail to a friend when you find your humour reducing.Challenge yourself to tell at least one good story in this message and you'll be surprised how funny things can look when told to someone outside the situation.Keep a list of funny things that you observe during your first few days in a new culture，and an explanation of what you think these things are all about.Look back on these lists later in the trip；what seemed strange before is probably familiar now，and your explanations may be funnier than the things themselves！Imagine writing an entry in a guidebook about a frustrating experience.How would you describe your experience to the later travellers？What travel advice would you offer?Try to see yourself through the eyes of locals.What might they find strange，funny about what you are doing at this moment？When you find it difficult to overcome cultural differences，taking a new look at yourself can be very funny.Be careful not to sacrifice (牺牲) respect for local culture in order to lighten things up for yourself and fellow travellers.【语篇解读】幽默可以使由于文化差异而给旅行者造成的不良情形得以改观，本文给那些要旅游而且希望变得幽默的人提出了3条建议。
【文库精品】高中英语 课时分层作业8 Unit 12 Culture Shock Section Ⅲ、Ⅳ 北师大版必修4
课时分层作业(八) Section Ⅲ、Ⅳ[语言知识练习固基础]Ⅰ.语境填词A)根据汉语或首字母提示，写出所缺单词1．There is no greater pleasure than lying on my back in the middle of the grassland，staring(凝视) at the night sky.2．When I entered the classroom，I felt that everyone was whispering(低声说) about me.3．Don't respond to any emails requesting personal information，no matter how official they look.4．When his brother was to cross the street，he was knocked down by a truck and badly injured．5．In order to get familiar with the new neighbour，I decided to call at his house.B)填写空白处所需要的内容(1个单词)或所提供单词的正确形式6．It's bad manners(manner) to ask other's salary if you are not very familiar.7．I've always been very cautious about/of giving my address to strangers because I do everything with caution.8．You can hardly imagine the great difficulty I had looking(look) after the noisy children.9．Do you think you have no doubt of his arrival(arrive) on time?10．The hospital has recently obtained new medical equipment，allowing(allow) more patients to be treated.Ⅱ.单句改错1．I stopped and he asked me for lift.lift前加a 2．He requested that she was dismissed.was→be 3．We had just covered less than 20 miles while we were stuck in the storm.while→when 4．To return to the problem of water pollution，I'd like you to look at a study having conducted in Australia in 2012.去掉having 5．There was no one nearby who might see him trying to break in the house.in→into[高考题型练习提能力]Ⅰ.阅读理解We know the westerners like to plan for their time carefully in order to do all the things that are important to them.So if your American or English friend asks you to dinner，he usually invites you a week ahead.But if you really have no time and can't go to the dinner，you can ring him to say sorry.The dinner is usually served at home，sometimes at a restaurant.You should get there on time，and don't forget to put on your fine clothes.It is also a good idea to take some little presents to your friend，such as flowers，chocolates and so on.When you are at dinner，you should also observe(遵守) some other customs.Here I'll give you some do's and don'ts about them：1．Don't leave bones on the table or the floor.(You should put them on your plate with fingers.)2．Don't use your bowl to drink soup，but use your spoon to help you instead.3．Don't talk with much food in your mouth.4．Don't ask others to have more wine.(This is quite different from that in China.)5．After dinner，use your napkin (餐巾) to clean your mouth and hands.6．Make sure small pieces of food are not left on your face.Then after dinner，you can stay there a little time.And your friend will be pleased if you leave in half an hour or so.Next day，you had better ring him up to thank him for the good dinner.【语篇解读】本文是一篇说明文。
英语：Unit12《Culture Shock》课件(1)(北师大版必修4)
①Research indicates that men are easier to give up smoking than women. 研究表明，男人比女人更容易戒烟。 研究表明，男人比女人更容易戒烟。 ②A high fever usually indicates severe illness. 高烧通常表明生了重病。 高烧通常表明生了重病。 ③Snow indicates the coming of winter. 雪象征着冬天的来到。 雪象征着冬天的来到。
4．majority n. 大半，大多数 ． 大半， the majority 大多数 其做主语表整体时，谓语用单数； 大多数(其做主语表整体时 谓语用单数； 其做主语表整体时， 若表成员情况时，谓语用复数。) 若表成员情况时，谓语用复数。 the majority of＋n. [U]＋单数谓语 ＋ ＋ the majority of＋n. [pl.]＋复数谓语 ＋ ＋ be in the majority 占大多数 by/with a majority of 以大多数……赢得…… 以大多数……赢得…… ……赢得
①I wouldn‘t exchange my watch with him for anything. 无论他拿什么东西，我都不换我的表。 无论他拿什么东西，我都不换我的表。 ② I took his camera in_exchange_for my watch. 我用我的手表换他的相机。 我用我的手表换他的相机。
即学即练 Let's have a(n)______of views on the matter. A．change ． C．exchange ． B．trade ． D．expression ．
解析： 意为“ 解析：have an exchange of views意为“交换观点”。 意为 交换观点” change 变化；trade贸易；expression短语，表情。 变化； 贸易； 短语， 贸易 短语 表情。 答案： 答案：C