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3 tháng 2 2019

Đáp án: C

Giải thích: 2 ý này trái ngược nhau nên e dùng từ whereas để nối.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.Solar energy does not create any (1) ________ and is widely used by many countries. It is (2) ________ source of power because the sun will continue to produce sunlight all the years. Solar panels which are required to harness this energy can be used (3)________ a long time and require little or no maintenance. (4) ________ , solar...
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Solar energy does not create any (1) ________ and is widely used by many countries. It is (2) ________ source of power because the sun will continue to produce sunlight all the years. Solar panels which are required to harness this energy can be used (3)________ a long time and require little or no maintenance. (4) ________ , solar energy proves to be ineffective in colder regions which don’t receive good sunlight. (5) ________ cannot be used during night and not all the light from the sun can be trapped by solar panels. Solar energy advantages are much more than its disadvantages (6) ________ make it as a viable source of producing alternative energy.
1. A. pollute​ B. pollution​ C. pollutedly​ D. polluted

2. A. renewable​ B. dangerous​ C. expensive​ D. ineffective

3. A. of​ B. for​ ​C. at​​ D. with

4. A. Therefore​ B. However​ C. So​​ D. Although

5. A. It​​ B. Its​ C. She​ D. He

6. A. who​ B. when​ C. which​ D. whom

2
1 tháng 3 2022

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Solar energy does not create any (1) ________ and is widely used by many countries. It is (2) ________ source of power because the sun will continue to produce sunlight all the years. Solar panels which are required to harness this energy can be used (3)________ a long time and require little or no maintenance. (4) ________ , solar energy proves to be ineffective in colder regions which don’t receive good sunlight. (5) ________ cannot be used during night and not all the light from the sun can be trapped by solar panels. Solar energy advantages are much more than its disadvantages (6) ________ make it as a viable source of producing alternative energy.
1. A. pollute​ B. pollution​ C. pollutedly​ D. polluted
2. A. renewable​ B. dangerous​ C. expensive​ D. ineffective
3. A. of​ B. for​ ​C. at​​ D. with
4. A. Therefore​ B. However​ C. So​​ D. Although
5. A. It​​ B. Its​ C. She​ D. He
6. A. who​ B. when​ C. which​ D. whom

1 tháng 3 2022

Solar energy does not create any (1) ________ and is widely used by many countries. It is (2) ________ source of power because the sun will continue to produce sunlight all the years. Solar panels which are required to harness this energy can be used (3)________ a long time and require little or no maintenance. (4) ________ , solar energy proves to be ineffective in colder regions which don’t receive good sunlight. (5) ________ cannot be used during night and not all the light from the sun can be trapped by solar panels. Solar energy advantages are much more than its disadvantages (6) ________ make it as a viable source of producing alternative energy.

1. A. pollute​ B. pollution​ C. pollutedly​ D. polluted

2. A. renewable​ B. dangerous​ C. expensive​ D. ineffective

3. A. of​ B. for​ ​C. at​​ D. with

4. A. Therefore​ B. However​ C. So​​ D. Although

5. A. It​​ B. Its​ C. She​ D. He

6. A. who​ B. when​ C. which​ D. whom

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.      More than 90 percent of teenagers nowadays use social media. The increasing usage of social media has led to (23) __________ large number of teenagers to be bullied or become a bully online. Cyberbullying, a (24) __________ to describe bullying that happens on technology platforms, is a serious problem. Studies show that...
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

      More than 90 percent of teenagers nowadays use social media. The increasing usage of social media has led to (23) __________ large number of teenagers to be bullied or become a bully online. Cyberbullying, a (24) __________ to describe bullying that happens on technology platforms, is a serious problem. Studies show that teenagers often say mean thing and hurt people because they are not aware of the effect of their action. When you socialize in real life, facial expressions and body language allows you (25) __________ what you say can be hurtful. The same thing cannot be said about when you socialize, using social media. Teenagers also bully because they can get away with it. Teens can (26) __________ bully their peers online without facing any real consequences. Being bullied can lead to depression, low self-esteem or suicide thought. Cyberbullying also (27) __________ the bullies who often have problem like violence tendency, alcohol and drug abuse……

Question 1.        A. a                             B. an                           C. the                          D. 0

Question 2.        A. way                        B. mean                      C. term                       D. kind

Question 3.        A. realize                   B. to realize               C. realized                 D. realizing

Question 4.        A. easy                       B. easily                     C. easier                     D. the easiest

Question 5.        A. effect                     B. effects                   C. affects                   D. affect

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Dear Anna,

            Before I answer your question, I just want to let you know how brave you are for reaching out for help. Most teenagers in your situation would not have written to me for advice.

Now onto your problem. When your friends talked you into smoking a cigarette with them, they were peers pressuring you. This happens to a lot of teenagers and even grow-ups. Friends try to influence in this case was negative because they pressured you into underage smoking which is dangerous. Don’t beat yourself up because you gave in. Peer pressure can even affect the strongest-willed person. Next time, when your friends ask you to smoke again, just hold your ground and say no. If they keep pressuring you, you should walk away and find a new group of friends, the one who can respect your decisions, and help you become a better person.

Question 6.        What is Anna’s problem?

A.    Her friends asked her to buy a cigarette for them.

B.    Her friends didn’t let her smoke a cigarette.

C.    Her friends bought a cigarette for her.

D.    Her friends persuaded her to smoke a cigarette with them.

Question 7.        Why was the influence of Anna’s friends negative according to Dr. Grey?

A.    Because Anna didn’t do what her friends want.

B.    Because Anna didn’t smoke with her friends.

C.    Because Anna’s friends were so dangerous.

D.    Because Anna’s friends pressured her into underage smoking which is dangerous.

Question 8.        Who can peer pressure affect?

A.    Anyone even the strongest-willed person.

B.    Anyone except for the strongest-willed person.

C.    People who are strong.

D.    Only the strong-willed person.

Question 9.        What does Dr. Grey advise Anna to do when her friends ask her to smoke again?

A.    Lie on the ground and say no                           C. Hold her ground and say no

B.    Hold her ground and say yes                            D. Lie on the ground and say yes

Question 10.    What kind of friends does Dr. Grey advise Anna to find?

A.    Those who can respect her decisions and help her become a better person.

B.    Those whose decisions she can respect and help them become better.

C.    Those who can respect her and those she can help to become better.

D.    Those who decisions she can respect and those who can help her become a better person.

0
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks Brazil’s most popular and festive holiday is Carnival. In fact, many people (28) ___________ Carnival one of the world’s biggest celebrations. Each spring, on Saturday before Ash Wednesday, the streets of Brazil’s largest city, Rio de Janeiro, come alive (29) ___________ parties, festivals and glamorous dances.The Samba School Parade...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks Brazil’s most popular and festive holiday is Carnival. In fact, many people (28) ___________ Carnival one of the world’s biggest celebrations. Each spring, on Saturday before Ash Wednesday, the streets of Brazil’s largest city, Rio de Janeiro, come alive (29) ___________ parties, festivals and glamorous dances.The Samba School Parade is the highlight of the (30) ___________ event. About 3000 performers, in colourful costumes embellished with feathers, beads and thousands of sequin dance down the parade route into the Sambadrome – a dance stadium (31) ___________ for the event. Judges award a (32) ___________ to the most spectacular groups of dancers.Question 28. A. believe B. regard C. consider D. hopeQuestion 29. A. with B. in C. of D. atQuestion 30. A. four days B. four – day C. fourth day D. four - daysQuestion 31. A. built B. build C. to build D. buildingQuestion 32. A. result B. price C. respect D. prize Rewrite sentences so that they are similar in meaning to the one given. 
1
9 tháng 3 2023

28 C

29 A

30 B

31 A

32 D

#YN

27 tháng 8 2021

c b a d

27 tháng 8 2021

25. C

26. B

27. C

28. D

• Read the following passage and mark the letter (A, B, C, or D) on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.                                                                                         SMARTPHONES - A NECCESITYSmartphones have spread beyond the boardroom and keeping a close eye on what's new is Mike Lazaridis, chief executive of RIM, the company that makes the BlackBerry smartphone. His device may no longer be quite as...
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Read the following passage and mark the letter (A, B, C, or D) on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

 

                                                                                        SMARTPHONES - A NECCESITY

Smartphones have spread beyond the boardroom and keeping a close eye on what's new is Mike Lazaridis, chief executive of RIM, the company that makes the BlackBerry smartphone. His device may no longer be quite as trendy as it once was but it is still (21) .................. − particularly for Argentinian milk farmers. Mr. Lazaridis says: "I like the way it's being used by the farmers so they are always up to date. Milk is a (22) .................. item, so delivery and production standards are incredibly important." He is reminded of the company's early days: "This is where we started in 1987, with a wireless vertical data business for the Swedish lumber (23) .................., and then on to fire brigades, ambulances, and garbage trucks."

    While the BlackBerry was quick to (24) .................. itself as the accessory of choice for business professionals such as Wall Street traders, the cheaper price (25) .................. and new, more colorful handsets now (26) .................. offer have opened it up to a much wider market. Mr. Lazaridis says: "It was obvious that business people and self-employed professionals would buy the BlackBerry, but we were not expecting the (27) .................. we had from ordinary consumers."

    The greatest challenge for RIM, however, could lie in an economic (28) ..................., when individuals and companies alike may see devices like the BlackBerry as luxuries they can (29) .................. without. The company has to make its product indispensable to the lifestyles of consumers or prove that they bring a real (30) .................. on investment for business users.

+ ANSWER:

21, A. constructive     B. functional     C. active     D. operative

22, A. perishable     B. short-lived     C. decaying     D. destructible

23, A. manufacturers     B. enterprise     C. commerce     D. industry

24, A. install     B. establish     C. create     D. demonstrate

25, A. designs     B. programmes     C. plans     D. systems

26, A. at            B. on             C. for            D. under

27, A. return     B. retort     C. reply     D. response

28, A. downturn     B. tall     C. decrease     D. drop

29, A. make      B. carry      C. do      D. stay

30, A. return      B. gain      C. interest      D. profit

 
0
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each numbered blank.Solar  energy  is  a  long  lasting  source  of  energy,  and  it can (26) almost anywhere. To generate solar energy, we only need solar cell sand (27) ! Solar cells can easily be   installed on house (28) , so we don’t need any new space. Compared toother renewable sources, they also possess many advantages: wind and water power rely on...
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each numbered blank.

Solar  energy  is  a  long  lasting  source  of  energy,  and  it can (26) almost anywhere. To generate solar energy, we only need solar cell sand (27) ! Solar cells can easily be   installed on house (28) , so we don’t need any new space. Compared toother renewable sources, they also possess many advantages: wind and water power rely on turbines which(29) noisy, expensive and which take up large space. Solar cells are totally silent  and(30) . As they have no moving parts, they require little maintenance and have a long life time

Question 23:

 

A. be used 

B. is used

C. be using 

D. to be used

 

Question 24:

 

A. the earth

B. the planet 

C. the sun 

D. the moon

 

Question 25: 

 

A. yards

B. roofs 

C. gardens 

D. door

 

Question 26: 

 

A. is 

B. be 

C. are 

D. was

 

Question 27: 

 

A. polluted 

B. polluting 

C. non-polluted 

D. non-polluting

 

Read the following passage, then choose the correct answer to questions 31 -

Devastating floods along the coast have left many people homeless. People are asked to help by donating food, clothes, furniture, and other supplies to the Assistance Fund. Donations of bottled water are especially needed, since the floods have disrupted the local water supply. In addition, volunteers are needed to travel to the flooded area to help distribute the donations.

Question 28: What does this notice concern?

 

A. Help for flood victims  

B. Safety precaution   

C. Dangerous roads

D. Warning about weather

 

Question 29: What kind of supplies is NOT mentioned?

 

A. Furniture

B. Clothing

C. Food.

D. Medicine

 

Question 30: In addition to supplies, what is needed?

 

A. Volunteers

B. New bridges

C. Places to stay

D. Teacher

 

Question 31: “Devastating floods” in line 1 refer to those that .

 

A. Happen suddenly

B. are very short

C. last for a long time 

D. cause a lot of damage

 

Question 32: The word “donating” in line 2 is closest in meaning to____________.

 

A. Selling         B. buying     C. giving D.taking

0
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.     English is the first language of many people in countries outside the United Kingdom. When you meet speakers of English from around the world, you immediately notice that they do not speak in the same way. There are also some (23) …………… in the words they use, including the names of (24) …………… objects that are part of everyone's...
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

     English is the first language of many people in countries outside the United Kingdom. When you meet speakers of English from around the world, you immediately notice that they do not speak in the same way. There are also some (23) …………… in the words they use, including the names of (24) …………… objects that are part of everyone's daily life. Although pronunciation and (25) …………… are not the same everywhere, it is interesting that English speakers (26) ……………. opposite sides of the world can understand each other quite easily. It does not seem to matter where they learnt the language. And of course, this is one reason why speakers of other languages are keen on learning English too. If you know English, you are more (27) ……………… to be able to study or work in all sorts of exciting places, such as the United States or Australia.

23. A. mistakes                        B. corrections       C. changes              D. differences

24. A. common                        B. popular             C. favourite                        D. general

25. A. reading              B. composition                 C. dictation             D. vocabulary

26. A. of                      B. in                      C. from                   D. at

27. A. likely                 B. probably           C. possibly              D. luckily

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

Are Sports Bad for Kids?

     People think children should play sports. Sports are fun, and children stay healthy while playing with others. However, playing sports can have negative effects on children. It may produce feelings of poor self-esteem or aggressive behavior in some children. According to research on kids and sports, 40 million kids play sports in the US. Of these, 18 million say they have been yelled at or called names while playing sports. This leaves many children with a bad impression of sports. They think sports are just too aggressive.

     Many researchers believe adults, especially parents and coaches, are the main cause of too much aggression in children’s sports. They believe children copy aggressive adult behavior. This behavior is then further reinforced through both positive and negative feedback. Parents and coaches are powerful teachers because children usually look up to them. Often these adults behave aggressively themselves, sending children the message that winning is everything. At children’s sporting events, parents may yell insults at other players or cheer when their child behaves aggressively. As well, children may be taught that hurting other players is acceptable, or they may be pushed to continue playing even when they are injured. In addition, the media makes violence seem exciting. Children watch adult sports games and see violent behavior replayed over and over on television.

     As a society, we really need to face up to this problem and do something about it. Parents and coaches should act as better examples for children. They also need to teach children better values. They should teach children to enjoy themselves whether they win or not. It is not necessary to knock yourself out to enjoy sports. Winning is not everything. In addition, children should not be allowed to continue to play when they are injured. Sending a child with an injury into a game gives the child the message that health is not as important as winning. If we make some basic changes, children might learn to enjoy sports again.

28. What is the main idea of the reading?

     A. Children often become like their parents.

     B. Children need to play sports in school.

     C. Playing sports may have negative results.

     D. Some sports can cause health problems.

29. How many children said they had some negative experience when playing sports?

     A. All of the children                      B. More than half of the children

     C. Less than half of the children     D. About ten percent of the children

30. Which is described as the main cause of more aggressive playing?

     A. Adults                                        B. Children with low grades in school

     C. New rules in sports                     D. Other players

31. What does the writer suggest?

     A. Aggressive sports should not be shown on television.

     B. Children should not play sports until high school.

     C. Coaches should be required to study child psychology.

     D. Parents should teach children to play sports for fun and exercise.

32. What would probably NOT be done when “facing up to a problem”?

     A. Ignoring the problem                              B. Finding the reason

     C. Admitting there is a problem                  D. Looking for a solution

 

0
Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.More than 90 percent of teenagers nowadays use social media. The increasing usage of social media has led to (23)________  large number of teenagers to be bullied or become a bully online. Cyberbullying, a (24) ___________ to describe bullying that happens on technology platforms, is a serious problem. Studies show that teenagers often...
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Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

More than 90 percent of teenagers nowadays use social media. The increasing usage of social media has led to (23)________  large number of teenagers to be bullied or become a bully online. Cyberbullying, a (24) ___________ to describe bullying that happens on technology platforms, is a serious problem. Studies show that teenagers often say mean thing and hurt other people because they are not aware of the effect of their action. When you socialize in real life, facial expressions and body language allows you (25) _________ what you say can be hurtful. The same thing cannot be said about when you socialize, using social media. Teenagers also bully because they can get away with it. Teens can (26) _________ bully their peers online without facing any real consequences. Being bullied can lead to depression, low self-esteem or suicide thought. Cyberbullying also (27)__________ the bullies who often have problem like violence tendency, alcohol and abuse...

 

Question 23: A. a B. an C. the D. 0    

Question 24: A. way B. mean C. term D. kind    

Question 25: A. realize B. to realize C. realized D. realizing    

Question 26: A. easy B. easily C. easier D. the easiest    

Question 27: A. effect B. effects C. affects D. affect  

 

 

 

 

 

 

 

 

 

2
5 tháng 1 2022

23c

24d

25a

26b

27d

5 tháng 1 2022

A

C

B

B

C

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.       The coronavirus is a kind of virus. Viruses are tiny germs that are so small that you can't see them. They are so (31)_______ that they can float through the air in tiny drops of water, and they can sit on your skin without you feeling them. If some of these germs get inside you, they can use your body to make more germs, and...
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

       The coronavirus is a kind of virus. Viruses are tiny germs that are so small that you can't see them. They are so (31)_______ that they can float through the air in tiny drops of water, and they can sit on your skin without you feeling them. If some of these germs get inside you, they can use your body to make more germs, and that can make you ill.

       There are lots of different sorts (32)_______ coronaviruses and some of them infect people. If you have been infected with one of these coronaviruses, all you probably (33)_______ was a snotty nose or a cough.

       But when this completely new coronavirus germ gets inside a human body, it causes (34)_______ illness called COVID-19. When people talk about "catching the coronavirus", they are talking about this illness. Because this coronavirus is new, scientists don't know everything about it yet. But they think that there are two main (35)_______ that people can catch it.

 

 Câu 31.A. big                          B. heavy                         C. light                            D. small

 Câu 32.A. for                          B. about                         C. of                               D. with

 Câu 33.A. made                      B. caught                        C. had                             D. took

 Câu 34.A. a                             B. 0                                C. an                               D. the

 Câu 35.A. behaviours             B. habits                         C. ways                           D. roads

 

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Last week, I went to visit Atlantic College, an excellent private college in Wales. Unusually, it gives people much needed experience of life outside the classroom, as well as the opportunity to study for their exams. The students, who are aged between 16 and 18 and come from all over the world, spend the morning studying. In the afternoon they go out and do a really useful activity such as helping on the farm, looking after people with learning difficulties, or checking for pollution in rivers.

        One of the great things about Atlantic College students is that they come from many different social backgrounds and countries. As few can afford the fees of 20,000 over two years, grants are available. A quarter of students are British, and many of those can only attend because they receive government help.

        “I really admire the college for trying to encourage international understanding among young people”, as Barbara Molenkamp, a student from the Netherlands, said. “You learn to live with people and respect them, even the ones you don’t like. During the summer holidays my mother couldn’t believe how much less I argued with my sister.”

         To sum up, Atlantic College gives its students an excellent education, using methods which really seem to work.

 Câu 36. What does the word "they" in paragraph 1 refer to?

       A. exams                            B. students                     C. difficulties                 D. rivers

 Câu 37. What is the percentage of British students at Atlantic College?

       A. 25%                              B. 75%                           C. 50%                            D. 20%

 Câu 38. What is the writer trying to do in the text?

       A. Describe the activities the students do in their free time.

       B. Give an opinion about a particular student.

       C. Describe his own experience of education.

       D. Give an opinion about a special type of education.

 Câu 39. Why does Barbara admire Atlantic College?

       A. Students can receive government help.

       B. The students come from many different social backgrounds and countries.

       C. The college uses effective methods.

       D. The college has tried to encourage international understanding among young people.

 Câu 40. Which activity is NOT mentioned in the passage?

       A. Taking care of people with learning difficulties.

       B. Helping on the farm.

       C. Going boating in rivers.                                      

       D. Checking for pollution in rivers.

giúp và chỉ chỗ có trong đoạn văn của b2 vs ạ, mình cảm ơn

2
9 tháng 2 2022

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Last week, I went to visit Atlantic College, an excellent private college in Wales. Unusually, it gives people much needed experience of life outside the classroom, as well as the opportunity to study for their exams. The students, who are aged between 16 and 18 and come from all over the world, spend the morning studying. In the afternoon they go out and do a really useful activity such as helping on the farm, looking after people with learning difficulties, or checking for pollution in rivers.

        One of the great things about Atlantic College students is that they come from many different social backgrounds and countries. As few can afford the fees of 20,000 over two years, grants are available. A quarter of students are British, and many of those can only attend because they receive government help.

        “I really admire the college for trying to encourage international understanding among young people”, as Barbara Molenkamp, a student from the Netherlands, said. “You learn to live with people and respect them, even the ones you don’t like. During the summer holidays my mother couldn’t believe how much less I argued with my sister.”

         To sum up, Atlantic College gives its students an excellent education, using methods which really seem to work.

 Câu 36. What does the word "they" in paragraph 1 refer to?

       A. exams                            B. students                     C. difficulties                 D. rivers

DC: The students, who are aged between 16 and 18 and come from all over the world, spend the morning studying.

 Câu 37. What is the percentage of British students at Atlantic College?

       A. 25%                              B. 75%                           C. 50%                            D. 20%

DC: A quarter of students are British, and many of those can only attend because they receive government help.

=> A quarter = 25%

 Câu 38. What is the writer trying to do in the text?

       A. Describe the activities the students do in their free time.

       B. Give an opinion about a particular student.

       C. Describe his own experience of education.

       D. Give an opinion about a special type of education.

 Câu 39. Why does Barbara admire Atlantic College?

       A. Students can receive government help.

       B. The students come from many different social backgrounds and countries.

       C. The college uses effective methods.

       D. The college has tried to encourage international understanding among young people.

DC: “I really admire the college for trying to encourage international understanding among young people”, as Barbara Molenkamp, a student from the Netherlands, said. “You learn to live with people and respect them, even the ones you don’t like.

 Câu 40. Which activity is NOT mentioned in the passage?

       A. Taking care of people with learning difficulties.

       B. Helping on the farm.

       C. Going boating in rivers.                                      

       D. Checking for pollution in rivers.

DC: In the afternoon they go out and do a really useful activity such as helping on the farm, looking after people with learning difficulties, or checking for pollution in rivers.

9 tháng 2 2022

ủa sao làm có một phần thế bạn =))

9 tháng 5 2017

Đáp án: D

Giải thích: Ở đây ta cần nghĩa là làm hại (cho môi trường)