2021知到答案 实境英语听说 智慧树网课章节测试答案

第一章 章节测试

1、选择题:After you have said goodbye by using phrase like “Have a good day” or “See you later”, you cannot say “Bye” at the very end.
选项：
A:对
B:错
答案: 【错】
2、选择题:Which might be a better way to know whether a person is married or not?
选项：
A:Ask how his/her family is.
B:Ask whether he/she is married or not.
C:Ask how many kids he/she has.
D:Ask how much money he/she can earn.
答案: 【Ask how his/her family is.】
3、选择题:How can you know the price of the item another person bought without violating other people’s privacy?
选项：
A:Say that you want buy one yourself and ask whether it is expensive.
B:Ask the price directly.
C:Ask the person whether he/she can tell you the price
D:Ask the discount directly.
答案: 【Say that you want buy one yourself and ask whether it is expensive.】
4、选择题:Which conversations are formal?
选项：
A:a: Hey, how’s it going?
b: Oh, not too bad, thanks.
 
B:a: Hi there. How are things, man?
b: Fine, thanks.
 
C:a: Good morning. How are you?
b: I’m very well, thank you. And you?
D:a: How do you do, Mr. Wang?
b: How do you do, Mr. Johnson?
答案: 【a: Good morning. How are you?
b: I’m very well, thank you. And you?
;
a: How do you do, Mr. Wang?
b: How do you do, Mr. Johnson?
】
5、选择题:As a response to “How do you do?”, you should say “Fine, thank you”.
选项：
A:对
B:错
答案: 【错】
6、选择题:British use “cheers” to mean “thanks and bye”.
选项：
A:对
B:错
答案: 【对】

第二章 章节测试

1、选择题:If you want to describe a person, you could introduce information like appearance, mannerism, character traits and emotions.
选项：
A:对
B:错
答案: 【对】
2、选择题:Appearance is what someone is from the inside. 
选项：
A:对
B:错
答案: 【错】
3、选择题:Which description is more polite?
选项：
A:She is quite fat.
B:She is a little curvy.
C:She is kind of heavy.
D:She is so big.
答案: 【She is a little curvy.】
4、选择题:What is the right description of family bond?
选项：
A:In China, the idea of family, blood relations and kinship are ingrained in Chinese people’s mind.
B:Western family structure is usually small because family members are not close to each other as Chinese do.
C:Westerners don’t value their families much.
D:Westerners have more time staying with their families.
答案: 【In China, the idea of family, blood relations and kinship are ingrained in Chinese people’s mind.】
5、选择题:The following sentence contains incomplete explosion:What day is it today?
选项：
A:对
B:错
答案: 【对】
6、选择题:The following sentence contains incomplete explosion:Ted has a bad cold today.
选项：
A:对
B:错
答案: 【对】
7、选择题:

The following sentence contains incomplete explosion:What are you looking at?
选项：
A:对
B:错
答案: 【错】

8、选择题:Generally speaking, Chinese parents are more responsible to their kids, while western parents pay less attention to their kids’ growth.
选项：
A:对
B:错
答案: 【错】
9、选择题:”Extrovert” is a description of appearance.
选项：
A:对
B:错
答案: 【错】

第三章 章节测试

1、选择题:By using modal verbs such as “could” or “may” can help you express yourself in a polite way.
选项：
A:对
B:错
答案: 【对】
2、选择题:Landmarks are points of reference and help the other person understand where to find you.
选项：
A:对
B:错
答案: 【对】
3、选择题:To ask for directions, you can use questions including:
选项：
A:How do I get to …
B:Could you tell me the best way to get to…
C:What is the quickest way to get to…
D:Where exactly am I?
答案: 【How do I get to …;
Could you tell me the best way to get to…;
What is the quickest way to get to…;
Where exactly am I?】
4、选择题:

Please put the following items in ascending order.

A. City

B. County

C. Province

D. Town

E. Village
选项：
A:ABCDE
B:CABDE
C:EDBAC
D:EDACB
答案: 【EDBAC】

5、选择题:Repetition is not a good idea to check your understanding when you ask for directions.
选项：
A:对
B:错
答案: 【错】
6、选择题:“Could you tell me the best way to get to …” – This is a very polite way to ask for directions.
选项：
A:对
B:错
答案: 【对】
7、选择题:If you need to go somewhere fast, you could say “what is the quickest way to get to …”.
选项：
A:对
B:错
答案: 【对】
8、选择题:The journey _____ about twenty minutes.
选项：
A:is long
B:takes
C:needs
D:spends
答案: 【takes】

第四章 章节测试

1、选择题: It is common to use small talk when you are waiting in a long line-up.
选项：
A:对
B:错
答案: 【对】[$]
2、选择题:One reason people use small talk is to eliminate an uncomfortable silence.
选项：
A:对
B:错
答案: 【对】
3、选择题:When do people start to shake hands?
选项：
A:The Middle Ages
B:The Renaissanc
C:The First Industrial Revolution
D:The Second Industrial Revolution
答案: 【The Middle Ages】
4、选择题: It is inappropriate to make small talk with your mailman.
选项：
A:对
B:错
答案: 【错】
5、选择题:Politics is a controversial subject according to society.
选项：
A:对
B:错
答案: 【对】
6、选择题:It is common to discuss the weather in an elevator.
选项：
A:对
B:错
答案: 【对】
7、选择题:It is rude to interrupt a conversation in order to make small talk.
选项：
A:对
B:错
答案: 【对】

第五章 章节测试

1、选择题:The intonation we use on the question tag can affect its purpose.
选项：
A:对
B:错
答案: 【对】
2、选择题:What is the benefit for American students taking part in different sports activities?
选项：
A:They can ease the economic pressure with the help of athletic scholarship, work-study programs and generous financial aid packages.
B:They can have a better academic performance for graduation.
C:They can get a better job after graduation.
D:They can have more time for study.
答案: 【They can ease the economic pressure with the help of athletic scholarship, work-study programs and generous financial aid packages.】
3、选择题:Which is not the benefit for students in joining in student clubs?
选项：
A:Build their network for future career.
B:Find more friends from their own country.
C:Earn more money.
D:Meet friends from different cultures.
答案: 【Earn more money.】
4、选择题:Where can you find information for part-time jobs?
选项：
A:Job fairs.
B:Financial aid office.
C:Both A and B.
D:Neither A  nor B.
答案: 【Both A and B.】
5、选择题:John is a nice guy, isn’t he? (降调) This question tag asks for agreement.
选项：
A:对
B:错
答案: 【对】
6、选择题:Your birthday was last week. wasn’t it? (升调) This question tag asks for agreement.
选项：
A:对
B:错
答案: 【错】
7、选择题:

How many syllables does each word have? Write the number of syllables in the space.

1.       commercial____

2.       city____

3.       special_____
选项：
A:4-2-4
B:4-2-3
C:3-2-2
D:3-2-3
答案: 【3-2-2】

8、选择题:

To continue your small talk, you can ask follow-up questions like:

a: I’ve worked at this school for 5 years.

b:
选项：
A:Where did you work before?
B:Why did you choose to come to this school?
C:What’s the best thing about working here?
D:How much do you earn?
答案: 【Where did you work before? ;
Why did you choose to come to this school? ;
What’s the best thing about working here?】

第六章 章节测试

1、选择题:Which sentence has a different meaning of “This is my treat” ?
选项：
A:It’s on me.
B:Let’s go Dutch.
C:I’ll get it.
D:I’ll pay the bill.
答案: 【Let’s go Dutch.】
2、选择题: Choose the sentence which is NOT appropriate.
选项：
A:The salad tastes fresh.
B:The sauce is tough.
C:The steak is juicy.
D:The chicken is tender.
答案: 【The sauce is tough.】
3、选择题: Choose the sentence which is NOT appropriate.
选项：
A:The chicken is soft.
B:The ice-cream is creamy.
C:The salad is crunchy.
D:The steak is medium well.
答案: 【The chicken is soft.】
4、选择题:Which of the following description is right
选项：
A:Place your knife and fork like a cross when you are ready for a second plate of food.
B:When you are drinking soup, lean your body to the table so that you won’t spill your soup.
C:Wear your napkin around your neck so that you don’t spill your soup on your clothes.
D:Place your knife and fork like a cross when you have finished your dinner.
答案: 【Place your knife and fork like a cross when you are ready for a second plate of food.】
5、选择题:Look at the picture. What is the name of No.1 untensil?
选项：
A:napkin
B:paper
C:tissue
D:cloth
答案: 【napkin】
6、选择题:

Look at the picture. What is the name of No.3 untensil?

选项：
A:tea spoon
B:salad spoon
C:soup spoon
D:dessert spoon
答案: 【soup spoon】

7、选择题:Starter is the first course of the meal.
选项：
A:对
B:错
答案: 【对】
8、选择题:Set menu is a list of dishes you can orfer together for a set price.
选项：
A:对
B:错
答案: 【对】

第七章 章节测试

1、选择题: “I feel under the weather.” means it is so sunny.
选项：
A:对
B:错
答案: 【错】
2、选择题:If you find people have misheard or misunderstood what you have said, stressing certain words is a useful way of correcting someone.
选项：
A:对
B:错
答案: 【对】
3、选择题:Suppose you’ve got a cold. You may have symptoms including:
选项：
A:cough
B:sore throat
C:tired
D:dizzy
答案: 【cough;
sore throat;
tired;
dizzy】
4、选择题:Which is the wrong description of see a doctor in the UK?
选项：
A:International students have to pay for healthcare services if they stay for over 6 months.
B:Tourists can have free healthcare services if they stay for over 6 months.
C:For the British, heathcare services are totally free.
D:Normally, seeing a doctor requires appointment.
答案: 【For the British, heathcare services are totally free.】
5、选择题:What is the process to see a doctor for non-emergency situations?
选项：
A:Go to the GP first and then follow their instructions.
B:Go directly to a big hospital for better medical care.
C:Contact a hospital to make an appointment first.
D:Go to a pharmacy to get some medicine.
答案: 【Go to the GP first and then follow their instructions.】
6、选择题:Judge whether the stresses of the following words are correct or not.’employee
选项：
A:对
B:错
答案: 【错】
7、选择题:You do not need to pay for your medicine for emergency in Britain.
选项：
A:对
B:错
答案: 【对】
8、选择题:My ______ is runny.
选项：
A:arm
B:leg
C:eyes
D:nose
答案: 【nose】
9、选择题:My _____ is itchy! I can’t stop scratching!
选项：
A:skin
B:tooth
C:stomach
D:hair
答案: 【skin】

第八章 章节测试

1、选择题:Suppose today is your friend Leo’s birthday, what could you say to him?
选项：
A:Happy birthday!
B:Wishing you a happy birthday!
C:Congratulations on your birthday!
D:Good birthday!
答案: 【Happy birthday!;
Wishing you a happy birthday!】
2、选择题:Suppose today is Christmas Day, what could you say to others?
选项：
A:Happy Christmas!
B:Fun Christmas!
C:Merry Christmas!
D:Good Christmas!
答案: 【Happy Christmas!;
Merry Christmas!】
3、选择题:Suppose your brother is going to take an exam, what could you say to him?
选项：
A:Best wishes for your exams.
B:Hope you do well in your exams.
C:Good luck with your exams etc.
D:Sorry for your exams.
答案: 【Best wishes for your exams.;
Hope you do well in your exams.;
Good luck with your exams etc.】
4、选择题:Circle the –s ending in each line that does not have the same sound as the others.
选项：
A:enjoys
B:wears
C:watches
D:sings
答案: 【watches】
5、选择题:Circle the –s ending in each line that does not have the same sound as the others.
选项：
A:dogs
B:horses
C:bees
D:flowers
答案: 【horses】
6、选择题:

It originally is a religious event in Christianity to celebrate God’s birth, but now it has become a secular holiday.
选项：
A:对
B:错
答案: 【错】

7、选择题:Which is not a celebration activity on Christmas Day？
选项：
A:Embark on a big sale.
B:Decorate the neighborhood.
C:Carry on charitable projects for wanderers.
D:Sing Christmas carols.
答案: 【Embark on a big sale.】
8、选择题:When you are invited to others’ home, what should you do?
选项：
A:Arrive on time.
B:Arrive a little earlier.
C:Arrive a little later
D:Arrive much later
答案: 【Arrive a little later】
9、选择题:Christmas is the most important traditional festival for westerners.
选项：
A:对
B:错
答案: 【对】

第九章 章节测试

1、选择题:

Which sentence could be used in a formal call?
选项：
A:Hey George. It’s Lisa calling.
B:Hello, this is Julie Madison calling.
C:Is Jackson there, please?
D:Hi. I’m Pip.
答案: 【Hello, this is Julie Madison calling.】

2、选择题:

To make a request, you could say:
选项：
A:Would you mind + v-ing…
B:I’d appreciate it if you could …
C:I wonder if you could…
D:Could you please do you a favor?
答案: 【Would you mind + v-ing…;
I’d appreciate it if you could …;
I wonder if you could…;
Could you please do you a favor?】

3、选择题:

An informal call may have:
选项：
A:slangs
B:colloquial forms
C:incomplete sentences
D:short sentences
答案: 【slangs;
colloquial forms;
incomplete sentences;
short sentences】

4、选择题:

Full Breakfast is is well known throughout Britain, and it is served not only at breakfast time but also throughout the day.
选项：
A:对
B:错
答案: 【对】

5、选择题:

Read the sentences below. Mark the letter a for /l/ sound or b for /l/ sound. 

Light the lamp

⑴            ⑵               

Is she little?

           (3) (4) 

选项：
A:aaaa
B:bbbb
C:abab
D:aaab
答案: 【aaab】

6、选择题:In the UK, the first floor is actually called “Ground Floor”, while the second floor is called “First Floor”.
选项：
A:对
B:错
答案: 【对】
7、选择题:Choose what you think are the useful expressions when you are booking a flight:
选项：
A:I’d like to enquire about flights.
B:Could you tell me about the flight availability?
C:Do you want to go economy, business or first class?
D:How many of you will be travelling?
答案: 【I’d like to enquire about flights.;
Could you tell me about the flight availability?;
Do you want to go economy, business or first class?;
How many of you will be travelling?】
8、选择题:Flight seats are usually divided into three classes: first class, business class and economy class.
选项：
A:对
B:错
答案: 【对】

第十章 章节测试

1、选择题:

You must pay tips when you are in western countries to show some politeness.
选项：
A:对
B:错
答案: 【错】

2、选择题:You can pay        tips of your bill for lunch.
选项：
A:6%
B:12%
C:22%
D:32%
答案: 【12%】
3、选择题:Content words are usually stressed in a sentence.
选项：
A:对
B:错
答案: 【对】
4、选择题:Function words should always be unstressed in a sentence.
选项：
A:对
B:错
答案: 【错】
5、选择题:The shift of the stress in a sentence can change the meaning of it.
选项：
A:对
B:错
答案: 【对】
6、选择题:Tip is stands for “to insure promptness”.
选项：
A:对
B:错
答案: 【对】
7、选择题:ATM machine can also be called a cash machine or cashpoint.
选项：
A:对
B:错
答案: 【对】
8、选择题:A bank statement is a summary of financial transactions which have occurred over a given period on a bank account.
选项：
A:对
B:错
答案: 【对】

第十一章 章节测试

1、选择题:To present visual information well, you need to understand detailed information and statistics.
选项：
A:对
B:错
答案: 【对】
2、选择题:To present visual information well, you need to describe every single details of charts and graphs.
选项：
A:对
B:错
答案: 【错】
3、选择题:To present visual information well, you need to use signpost words to link ideas effectively.
选项：
A:对
B:错
答案: 【对】
4、选择题:

Class participation contributes to your final grade.
选项：
A:对
B:错
答案: 【对】

5、选择题:If you encounter any difficulties regarding course selections, course scheduling, progress through a program, long-term academic planning and any other academic issues, you can turn to       for help on such topics as study skills, academic success, time management and career choices.
选项：
A:assigned academic advisor
B:workshops
C:study groups
D:student union
答案: 【assigned academic advisor】
6、选择题:A good summary should try to repeat everything.
选项：
A:对
B:错
答案: 【错】
7、选择题:To summarize a lecture is a good way to check you have understood it.
选项：
A:对
B:错
答案: 【对】

第十二章 章节测试

1、选择题:In a group discussion, you could:
选项：
A:explain your idea.
B:use statistics.
C:involve your audience by asking questions.
D:interrupt others when you have a new idea.
答案: 【explain your idea.;
use statistics.;
involve your audience by asking questions.】
2、选择题:It is not a polite thing to interrupt others while they are talking.
选项：
A:对
B:错
答案: 【对】
3、选择题:Good discussion manners include:
选项：
A: Full participation
B:Keep it long
C:Speak clearly
D:Make some interruption
答案: 【 Full participation;
Speak clearly】
4、选择题:

Harvard Library system is not only the oldest also the largest library in the US, holding 10 million of books and comprising over 100 branch libraries.
选项：
A:对
B:错
答案: 【对】

5、选择题:

What are the things you can do in libraries?
选项：
A:Borrow Books.
B:Make Copies.
C:Study.
D:Group discussion.
答案: 【Borrow Books.;
Make Copies.;
Study.;
Group discussion.】

6、选择题:Library is the No. 1 place where students like to write essays, papers or dissertations. You can find plentiful resource for their research, but you should never commit plagiarism.
选项：
A:对
B:错
答案: 【对】
7、选择题:The following words can be linked when you pronounce them.a cup of tea
选项：
A:对
B:错
答案: 【对】
8、选择题:The following words can be linked when you pronounce them. absent minded
选项：
A:对
B:错
答案: 【错】
9、选择题:The following words can be linked when you pronounce them.in a minute
选项：
A:对
B:错
答案: 【对】

第十三章 章节测试

1、选择题:To disagree in a group discussion, you could say:
选项：
A:You make a very good point but I would also like to add that.
B:I’m not sure I agree.
C:Sorry, but can I make a point?
D:You are wrong.
答案: 【You make a very good point but I would also like to add that.;
I’m not sure I agree.】
2、选择题:To interrupt in a group discussion, you could say:
选项：
A:I’m afraid that’s not how I see it.
B:Sorry, do you mind if I interrupt?
C:Could I say something here?
D:Oh, I have a new idea.
答案: 【Sorry, do you mind if I interrupt?;
Could I say something here?】
3、选择题:To correct misunderstandings in a group discussion, you could say:
选项：
A:Don’t get me wrong. I mean…
B:That’s not quite what I mean.
C:Sorry. I think you’ve misunderstood me.
D:No, you don’t understand me.
答案: 【Don’t get me wrong. I mean…;
That’s not quite what I mean.;
Sorry. I think you’ve misunderstood me.】
4、选择题:

You should speak perfect English in order to better express your idea.
选项：
A:对
B:错
答案: 【错】

5、选择题:In which sentence, you cannot find a synonym(同义词) of the word in red?
选项：
A:There is a drawback, a disadvantage, to that idea.
B:Taking the time to prepare for a test is a sensible, prudent decision.
C:During a drought, plants that are indigenous to the area typically do better than non-native plants.
D:Although I prefer the calmer rides at amusement parks, the rest of my family loves the formidable ones.
答案: 【Although I prefer the calmer rides at amusement parks, the rest of my family loves the formidable ones.】
6、选择题:

Find the correct nasals in each word and write them down in the blanks.

1.       comb     ________

2.       ban      ________

3.       sing      ________
选项：
A:/ŋ/ /n/ /m/
B:/m//ŋ/ /n/ 
C:/m/ /n/ /ŋ/
D: /n/ /ŋ//m/
答案: 【/m/ /n/ /ŋ/】

7、选择题:When you work independently, you’re limited to your own ideas and experiences. When you work in a group, you kind of stand on the shoulders of the collective and hence are able to do it better.
选项：
A:对
B:错
答案: 【对】
8、选择题:

Your opinion: These meetings are a waste of time.

You say: These meetings don’t tend to be particular useful.

You have used the strategies _____ to be more polite.
选项：
A:No. 1 Avoid negative adjectives by using a negative verb with a positive adjective.
B:No.2 Reduce the strength of what you say, e.g. extremely – rather.
C:No.3 Turn a statement into a question.
D:No. 4 Use general and cautious language, e.g. on the whole, in general, tend to, might, etc.
答案: 【No. 1 Avoid negative adjectives by using a negative verb with a positive adjective.;
No. 4 Use general and cautious language, e.g. on the whole, in general, tend to, might, etc.】

9、选择题:Your opinion: Our performance was poor.You say: Would you agree that on the whole, our performance wasn’t very good?You have used the strategies _____ to be more polite.
选项：
A:No. 1 Avoid negative adjectives by using a negative verb with a positive adjective.
B:No.2 Reduce the strength of what you say, e.g. extremely – rather.
C:No.3 Turn a statement into a question.
D:No. 4 Use general and cautious language, e.g. on the whole, in general, tend to, might, etc.
答案: 【No. 1 Avoid negative adjectives by using a negative verb with a positive adjective.;
No.3 Turn a statement into a question.;
No. 4 Use general and cautious language, e.g. on the whole, in general, tend to, might, etc.】
10、选择题:Using negative adjectives will be more polite than using a negative verb with a positive adjective.
选项：
A:对
B:错
答案: 【错】

第十四章 章节测试

1、选择题:To welcome your audience in a presentation, you could say:
选项：
A:Good morning to you all.
B:Hello. Thank you for giving me this opportunity to …
C:Today I want to talk to you about…
D:That’ all. Thank you for listening
答案: 【Good morning to you all.;
Hello. Thank you for giving me this opportunity to …】
2、选择题:To give an overview of your talk in a presentation, you could say:
选项：
A:First of all, I’ll go over some background details.
B:Then I’ll look at…
C:After that, I’ll move on to…
D:Finally, I’ll review the main points.
答案: 【First of all, I’ll go over some background details.;
Then I’ll look at…;
After that, I’ll move on to…;
Finally, I’ll review the main points.】
3、选择题:To explain rules for questions in a presentation, you could say:
选项：
A:To start with, I’ll review…
B:Feel free to interrupt me if you have any questions…
C:I’ll make sure we have enough time for questions at the end.
D:Next I’ll introduce …
答案: 【Feel free to interrupt me if you have any questions…;
I’ll make sure we have enough time for questions at the end.】
4、选择题:The word “idea” is pronounced the same way both in British and American English.
选项：
A:对
B:错
答案: 【对】
5、选择题:British crisps are French fries in America.
选项：
A:对
B:错
答案: 【错】
6、选择题:The K.K system is used to refer to the norm of American in the IPA chart.
选项：
A:对
B:错
答案: 【对】
7、选择题:According to the video, lot of students are still using Facebook because            . 
选项：
A:it is a good way to express your idea.
B:it is fashionable.
C:it helps you to contact your friends.
D:it is free.
答案: 【it helps you to contact your friends.】
8、选择题:Which APP can help you to find the information about local stores, restaurants, the latest movies, the most favorable price for lots of items as well as reviews and rates from users?
选项：
A:Snapchat
B:Yelp
C:Uber
D:Wechat
答案: 【Yelp】
9、选择题:With Chegg Books, you can find second-hand textbooks at a favorable price, either to buy or rent.
选项：
A:对
B:错
答案: 【对】
10、选择题:

Match Chinese with English translations.

A.打开网页

B.点击链接

C.收藏

D.访问网站
选项：
A:click on a link-add to favorites-access a website-open a web page
B:open a web page–click on a link-add to favorites-access a website
C:click on a link-add to favorites–open a web page-access a website
D:access a website–open a web page–click on a link-add to favorites
答案: 【open a web page–click on a link-add to favorites-access a website】

第十五章 章节测试

1、选择题:Body language would hinder you to get across your point effectively.
选项：
A:对
B:错
答案: 【错】
2、选择题:KISS rule in a presentation refers to Keep It Short and Simple.
选项：
A:对
B:错
答案: 【对】
3、选择题:To emphasize important information in your presentation, you could:
选项：
A:slow down
B:speaker louder
C:pause
D:let your voice drop at the end of a sentence
答案: 【slow down;
speaker louder;
pause】
4、选择题:

The word “pair” contains the diphthong ______.
选项：
A:/ɪə/
B:/eə/
C:/ʊə/
D:/aiə/
答案: 【/eə/】

5、选择题:The word “cow” contains the dipthong _______.
选项：
A:/aʊ/
B:/əʊ/
C:/ɔɪ/
D:/ɔw/
答案: 【/aʊ/】
6、选择题:

 What are the purposes of America Recycles Day?
选项：
A:To promote the benefits of recycling.
B:To encourage Americans to recycle.
C:To appeal people to to create a better natural environment.
D:To have fun.
答案: 【To promote the benefits of recycling.;
To encourage Americans to recycle.;
To appeal people to to create a better natural environment.】

7、选择题:What are the reasons of using your own water bottle in the video?
选项：
A:It’s sustainable.
B:It’s cheaper.
C:It’s more hygienic.
D:It’s cool.
答案: 【It’s sustainable.;
It’s cheaper.】
8、选择题:With waste sorting, recycling will be more efficient.
选项：
A:对
B:错
答案: 【对】[/$]