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27 tháng 5 2018

1. It was very ...nice.. of you to invite me to your birthday party. Due to industrialization, we have to cope .……. The fact that many species are…… danger …… extinction.
A. on/ at/ for. B. at/ upon/ over. C. for/ on/ with. D. with/in/ on

28 tháng 5 2018

1 it was very .nice.... of you to invite me to your birthday party. Due to industrialization, we have to cope .……. The fact that many species are…… danger …… extinction.

A. on/ at/ for. B. at/ upon/ over. C. for/ on/ with. D. with/in/ on

2 tháng 1 2017

Đáp án D.

Ta có các cụm động từ:

- cope with (v): làm quen với, chấp nhận

- in danger: gặp nguy hiểm

- in danger of extinction: gặp mối nguy tuyệt chủng

Dịch câu: Vì quá trình công nghiệp hoá, chúng ta phải chấp nhận sự thật rằng nhiều loài động vật đang có nguy cơ bị tuyệt chủng.

Điền giới từ 3. What time did they arrive ... London? 5. Every student should spend ... least 2 hours on his homework every night. 9. Did you go on holiday ... yourself? 10. They have been waiting ... the bus for half an hour. 11. She has become very famous ... her novels. 14. Clean air is necessary ... our health 15. She is always fed up ... washing dishes after dinner 18. She is very angry ... me 19. I'm very grateful ... her ... her help 20. She is very jealous ... her...
Đọc tiếp

Điền giới từ

3. What time did they arrive ... London?

5. Every student should spend ... least 2 hours on his homework every night.

9. Did you go on holiday ... yourself?

10. They have been waiting ... the bus for half an hour.

11. She has become very famous ... her novels.

14. Clean air is necessary ... our health

15. She is always fed up ... washing dishes after dinner

18. She is very angry ... me

19. I'm very grateful ... her ... her help

20. She is very jealous ... her sister

21. I'm very sorry ... what I have done

22. Miss White was very upset ... the news of her father's death

23. Don't you think you should try to be friendly ... your classmate?

24. My daily expense are just about equal ... my income

25. We were very doubtful ... his ability.

26. The gloves aren't very suitable ... that kind of work

27. She was sad because he was rude ... her

29. Everybody was surprised ... the news

30. Are you excited ... going on holiday next week?

Chọn phương án đúng

1. This organization is quick ... sending relief goods to the flooded areas.

A. with B. at C. for D. about

2. When are you leaving ... Singapore? This week or next week?

A.for B.in C.to D.at

3. Can you help me, please? I can't see the differences ... these words

A.from B.in C.between D.about

4. That house reminds me ... the one where I used to live

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

5. It was very kind ... you to lend me the money I needed.

A.for B.of C.to D.with

6. We have to apply effective measures to save many plant and animal species .... extinction

A.from B.in C.for D.on

7. Clearing forests for timber has resulted ... the loss of biodiversity

A.with B.at C.in D.for

8.She is looking ... a new place to live because she doesn't want to depend ... her parents any more

A. for/on B.after/with C.up/forward D. at/into

9. Due to industrialization, we have to cope ... the fact that many species are ... danger ... extinction

A. over/at/for B.at/upon/over C.for/on/with D.with/in/of

10. Boys!Put your toys ... It is time go to bed. Don't stay ... late

A.off/on B.away/up C.down/off D.around/for

11. She intended to quit her job to stay ... home and look ... her sick mother

A. in/at B.at/after C.for/over D.up/on

12. He is very worried ... his new job because he is not quite prepared ... working

A. on/over B.to/off C.about/for D.in/at

13. Instead ... petrol, cars will only run ... solar energy and electricity

A.of/on B.for/by C.in/over D.from/upon

14. She has a promising future ahead ... her

A. for B.from C.on D.of

15. If you have ever watched tv, you have seen plenty ... drug advertisements

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

16. According ... Bill, there's something wrong ... my computer

A. after/for B.on/about C.to/with D.upon/at

17. I'm terrified ... breaking down on a motorway at night

A. from B.with C.for D. of

18. As an adult, i am independent ... my parents financially

A.of B.with C. out D. on

19. Today,women are increasingly involved ... the politics

A.of B.in C.with D.from

20. Do you have any objections ... this new road scheme?

A.at B.with C.to D.for

21. As I was ... of the change in the program, I arrived half an hour late for the rehearsal

A. unaware B. unconscious C. unable D. unreasonable

22. May I introduce you ... Mrs Brown?

A.with B.for C.to D.of

23. She likes reading books ... the library

A.in B.at C.on D.from

25. Please write your answers ... ink

A. in B.with C.of D.by

26. Bread is usually made ... wheat

A. from B.of C.with D.by

27. Education in many countries is complusory ... the age of 16

A.for B.when C.until D.forwards

28. Lack ... food had stunted his growth

A. of B. in C.for D.on

29.Family members who live apart try to get together ... Tet

A.in B.at C.on D.during

30. On Christmas Eve children go to bed full ... excitement.

A. of B.with C.up D. in

Chọn đáp án đúng

1.She was confused (with/on/about/in) the dates

3.The boy is afraid (of/on/in/about) snakes

4. He was successful (in/with/of/to) his job

5. We are ashamed (at/in/to/of) his behavior

6.Iraq is rich (on/at/to/in) oil

7. Smoking is harmful (for/with/to/about) our health

8.She is serious (with/about/of/for) learning to be a doctor

9. I have some tickets available (for/to/of/with) you

10. Are you capable (with/of/for/to) doing that job?

11. She has suffered (from/to/with/about) her heart attack

12. Most children are ill-prepared (to/for/from/at) employment

13. English belongs (from/to/on/in) those who use it

14. Four-fifths of the world's computers use programs (at/in/on/about) E

15. My father insisted (in/on/of/at) building a new house

17. The streets are crowded (at/in/with/of) vehicles at the rush hour

18. The air at the seaside is good (at/for/on/of) health

19. I'm not acquainted (at/in/with/of) those flowers

20. Your words are contrary (to/in/on/of) your acts

21. He is said (about/in/on/of) his son's lazinees

22. The book is divided (to/in/into/for) 3 parts

23. We are grateful (at/in/on/to) our teacher

25. Your profession is similar (to/in/on/of) mine

27. Teachers are responsible (at/for/to/of) their teaching

28. The beach is full (at/in/to/of) tourists in summer

29. We are present (at/in/to/of) the lecture yesterday

30. That singer has become very popular (at/with/to/of) the youth

1
21 tháng 11 2019

Điền giới từ

3. What time did they arrive ..IN. London?

5. Every student should spend ..AT. least 2 hours on his homework every night.

9. Did you go on holiday .BY.. yourself?

10. They have been waiting ..FOR. the bus for half an hour.

11. She has become very famous ..FOR. her novels.

14. Clean air is necessary .FOR.. our health

15. She is always fed up .WITH.. washing dishes after dinner

18. She is very angry ..AT. me

19. I'm very grateful ..TO. her .FOR.. her help

20. She is very jealous .OF.. her sister

21. I'm very sorry .ABOUT.. what I have done

22. Miss White was very upset .ABOUT.. the news of her father's death

23. Don't you think you should try to be friendly .WITH.. your classmate?

24. My daily expense are just about equal .TO.. my income

25. We were very doubtful .AT.. his ability.

26. The gloves aren't very suitable ..FOR. that kind of work

27. She was sad because he was rude .TO.. her

29. Everybody was surprised .AT.. the news

30. Are you excited .ABOUT.. going on holiday next week?

Chọn phương án đúng

1. This organization is quick ... sending relief goods to the flooded areas.

A. with B. at C. for D. about

2. When are you leaving ... Singapore? This week or next week?

A.for B.in C.to D.at

3. Can you help me, please? I can't see the differences ... these words

A.from B.in C.between D.about

4. That house reminds me ... the one where I used to live

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

5. It was very kind ... you to lend me the money I needed.

A.for B.of C.to D.with

6. We have to apply effective measures to save many plant and animal species .... extinction

A.from B.in C.for D.on

7. Clearing forests for timber has resulted ... the loss of biodiversity

A.with B.at C.in D.for

8.She is looking ... a new place to live because she doesn't want to depend ... her parents any more

A. for/on B.after/with C.up/forward D. at/into

9. Due to industrialization, we have to cope ... the fact that many species are ... danger ... extinction

A. over/at/for B.at/upon/over C.for/on/with D.with/in/of

10. Boys!Put your toys ... It is time go to bed. Don't stay ... late

A.off/on B.away/up C.down/off D.around/for

11. She intended to quit her job to stay ... home and look ... her sick mother

A. in/at B.at/after C.for/over D.up/on

12. He is very worried ... his new job because he is not quite prepared ... working

A. on/over B.to/off C.about/for D.in/at

13. Instead ... petrol, cars will only run ... solar energy and electricity

A.of/on B.for/by C.in/over D.from/upon

14. She has a promising future ahead ... her

A. for B.from C.on D.of

15. If you have ever watched tv, you have seen plenty ... drug advertisements

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

16. According ... Bill, there's something wrong ... my computer

A. after/for B.on/about C.to/with D.upon/at

17. I'm terrified ... breaking down on a motorway at night

A. from B.with C.for D. of

18. As an adult, i am independent ... my parents financially

A.of B.with C. out D. on

19. Today,women are increasingly involved ... the politics

A.of B.in C.with D.from

20. Do you have any objections ... this new road scheme?

A.at B.with C.to D.for

21. As I was ... of the change in the program, I arrived half an hour late for the rehearsal

A. unaware B. unconscious C. unable D. unreasonable

22. May I introduce you ... Mrs Brown?

A.with B.for C.to D.of

23. She likes reading books ... the library

A.in B.at C.on D.from

25. Please write your answers ... ink

A. in B.with C.of D.by

26. Bread is usually made ... wheat

A. from B.of C.with D.by

27. Education in many countries is complusory ... the age of 16

A.for B.when C.until D.forwards

28. Lack ... food had stunted his growth

A. of B. in C.for D.on

29.Family members who live apart try to get together ... Tet

A.in B.at C.on D.during

30. On Christmas Eve children go to bed full ... excitement.

A. of B.with C.up D. in

Chọn đáp án đúng

1.She was confused (with/on/about/in) the dates=>ABOUT

3.The boy is afraid (of/on/in/about) snakes=>OF

4. He was successful (in/with/of/to) his job=>IN

5. We are ashamed (at/in/to/of) his behavior=>OF

6.Iraq is rich (on/at/to/in) oil=>IN

7. Smoking is harmful (for/with/to/about) our health=>TO

8.She is serious (with/about/of/for) learning to be a doctor=>ABOUT

9. I have some tickets available (for/to/of/with) you=>FOR

10. Are you capable (with/of/for/to) doing that job?=>OF

11. She has suffered (from/to/with/about) her heart attack=>FROM

12. Most children are ill-prepared (to/for/from/at) employment=>FOR

13. English belongs (from/to/on/in) those who use it=>TO

14. Four-fifths of the world's computers use programs (at/in/on/about) E=>IN

15. My father insisted (in/on/of/at) building a new house=>ON

17. The streets are crowded (at/in/with/of) vehicles at the rush hour=>WITH

18. The air at the seaside is good (at/for/on/of) health=>AT

19. I'm not acquainted (at/in/with/of) those flowers=>AT

20. Your words are contrary (to/in/on/of) your acts=>TO

21. He is said (about/in/on/of) his son's lazinees=>ABOUT

22. The book is divided (to/in/into/for) 3 parts=>INTO

23. We are grateful (at/in/on/to) our teacher=>TO

25. Your profession is similar (to/in/on/of) mine=>TO

27. Teachers are responsible (at/for/to/of) their teaching=>FOR

28. The beach is full (at/in/to/of) tourists in summer=>OF

29. We are present (at/in/to/of) the lecture yesterday=>AT

30. That singer has become very popular (at/with/to/of) the youth=>WITH

3. Complete the sentences, using the correct form of the words in brackets. 1. Walking alone late at night can be (danger) . 2. The latest (edit) of this book contains many illustrative pictures. 3. Her younger sister can be (annoy) when she behaves haughtily. 4. You must read the (instruct) carefully before you use the new oven. 5. We were taken aback at the (drama) changes in our village; each home owns a computer now. 6. It is always (interest) to watch the cubs at play. 7. My mother...
Đọc tiếp
3. Complete the sentences, using the correct form of the words in brackets. 1. Walking alone late at night can be (danger) . 2. The latest (edit) of this book contains many illustrative pictures. 3. Her younger sister can be (annoy) when she behaves haughtily. 4. You must read the (instruct) carefully before you use the new oven. 5. We were taken aback at the (drama) changes in our village; each home owns a computer now. 6. It is always (interest) to watch the cubs at play. 7. My mother advised me to be careful in my (choose) of friends. 8. The (hot) makes everybody very drowsy during the lesson in class. 9. The couple came here at the special (invite) of the prime minister. 10. Please (low) the volume of your voice. I can even hear you from next door. 4. Choose the correct answers. 1. Many species of wildlife are becoming extinct, the rainforests are being destroyed. A. therefore B. since C. consequently D. so 2. Hemp can be used to make paper, it could reduce the need for logging. A. consequently B. due to C. so D. since 3. logging provides jobs and profits, the government is reluctant to control it. A. so B. Consequently C. Since D. Due to 4. Hemp was grown throughout history its versatility; it can be used to make many different things. A. due to B. because C. since D. as a result 5. Hemp is related to the marijuana plant; it is illegal in many countries. A. so B. due to C. as a result D. because 6. The polluted chemical waste was dumped into the ocean; , the mass of fish died. A. because B. as C. because of D. consequently 7. It was guessed that the fish died a powerful toxin in the sea water. A. because of B. because C. since D. as a result 8. Many species in BC are threatened logging. A. so B. because C. since D. due to 9. Smoking can heart disease. A. lead to B. create C. causes D. due to 10. Radioactive pollution is increasing the increased use of radioactivity. A. as B. since C. because of D. because
0
18 tháng 1 2023

1-G

2-H

3-I

4-A

5-D

6-E

7-C

8-J

9-F

10-B

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 It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures...
Đọc tiếp

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

It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions, many species became extinct at the same time- a mass extinction. One of the best-known examples of mass extinction occurred 65 mmion years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affecting even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intensive every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events. 

According to the passage, it is believed that the largest extinction of a species occourred _______. 

A. 26 million years ago 

B. 250 million years ago 

C. 225 million years ago 

D. 65 million years ago 

1
2 tháng 6 2017

Kiến thức: Đọc hiểu

Giải thích:

Theo đoạn văn, người ta tin rằng sự tuyệt chủng lớn nhất của một loài đã xảy ra ___.

A. 26 triệu năm trước                      B. 250 triệu năm trước

C. 225 triệu năm trước                    D. 65 triệu năm trước

Thông tin: Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died.

Tạm dịch: Có lẽ sự tuyệt chủng hàng loạt lớn nhất là xảy ra cách đây 225 triệu năm, khi mà gần như 95 phần trăm các loài sinh vật đã chết.

Chọn C 

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7 It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an...
Đọc tiếp

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species become extinct at the same time- a mass extinction. One of the best- known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when appropriately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the ocean. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

According to paragraph 2, evidence from fossil suggests that

A. extinction of species has occurred from time to time throughout Earth’s history

B. dinosaurs became extinct much earlier than scientists originally believed

C. extinctions on Earth have generally been massive

D. there has been only one mass extinction in Earth’s history

1
15 tháng 7 2019

Đáp án A

Theo đoạn 2, bằng chứng từ hóa thạch chỉ ra rằng:

A. Sự tuyệt chủng của các loài đã xảy ra liên tục trong suốt tiến trình lịch sử Trái Đất.

B. Khủng long đã tuyệt chủng sớm hơn nhiều so với các nhà khoa học tin rằng.

C. Sự tuyệt chủng trên trái đất nhìn chung là mang tính hàng loạt.

D. Chỉ có duy nhất 1 lần sự tuyệt chủng hàng loạt diễn ra trong lịch sử Trái Đất.

Dẫn chứng ở câu đầu tiên đoạn 2: “The fossil record reveals that extinction has occurred throughout the history of Earth”- ( Ghi nhận về hóa thạch tiết lộ rằng sự tuyệt chủng đã xảy ra trong suốt tiến trình lịch sử Trái Đất)

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7 It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an...
Đọc tiếp

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species become extinct at the same time- a mass extinction. One of the best- known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when appropriately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the ocean. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

The underlined word “demise” is closest in meaning to

A. help

B. change

C. death

D. recovery

1
12 tháng 8 2017

Đáp án C

Đáp án C. demise (n) = death: cái chết.

Các đáp án còn lại:

A. help (n+v): giúp đỡ.

B. change (n+v): thay đổi.

D. recovery (n): sự khôi phục, sự phục hồi

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7 It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an...
Đọc tiếp

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species become extinct at the same time- a mass extinction. One of the best- known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when appropriately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the ocean. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

The underlined word “ultimately” is closest in meaning to

A. eventually

B. unfortunately

C. dramatically

D. exceptionally

1
6 tháng 9 2019

Đáp án A

Đáp án A. ultimately = eventually: cuối cùng, rốt cục thì.

Các đáp án còn lại:

B. không may mắn.

C. đột ngột.

D. cá biệt, khác thường.

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7 It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an...
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Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species become extinct at the same time- a mass extinction. One of the best- known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when appropriately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the ocean. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

Why is “plankton” mentioned in the second paragraph?

A. To demonstrate the interdependence of different species

B. To illustrate a comparison between organisms that live on the land and those that live in the ocean

C. To emphasize the importance of food resources in preventing mass extinction

D. To point out that certain species could never become extinct

1
27 tháng 5 2018

Đáp án A

Tại sao sinh vật phù du được đề cập tới ở đoạn 2?

A. Để chứng minh sự phụ thuộc giữa các loài khác nhau.

B. Để minh họa cho sự so sánh giữa các sinh vật sống trên mặt đất và những sinh vật sống trong đại dương.

C. Để nhấn mạnh tầm quan trọng của nguồn thức ăn trong việc ngăn chặn sự tuyệt chủng hàng loạt.

D. Để chỉ ra rằng một số loài nhất định sẽ không bao giờ bị tuyệt chủng.

Dẫn chứng ở câu thứ 5+6 ở đoạn 2: “ Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the ocean” – ( Sự tuyệt chủng hàng loạt bị gây ra bởi sự biến đổi môi trường nhanh chóng và có thể tồi tệ hơn là do mối tương quan mật thiết giữa các loài. Ví dụ như có điều gì đó xảy ra làm hủy diệt số lượng lớn các loài sinh vật phù dù trong đại dương, thì lượng ô-xi trên trái đất cũng từ đó mà giảm theo làm ảnh hưởng không chỉ tới các loài sinh vật đại dương).