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18 tháng 1 2018

Đáp án C.

Nghĩa câu gốc: Khi tỷ lệ thất nghiệp cao, tỷ lệ tội phạm thường cũng cao.

Đáp án C sử dụng cấu trúc so sánh kép: Tỷ lệ thất nghiệp càng cao, tỷ lệ tội phạm càng cao.

Các đáp án còn lại sai nghĩa gốc:

B. The unemployment rate is as high as the crime rate: Tỷ lệ thất nghiệp cao như tỷ lệ tội phạm.

A. The unemployment rate and the crime rate are both higher: Tỷ lệ thất nghiệp và tỷ lệ tội phạm đều cao hơn.

D. The high rate of unemployment depends on the high rate of crime: Tỷ lệ thất nghiệp cao phụ thuộc vào tỷ lệ tội phạm cao.

9 tháng 8 2017

ĐÁP ÁN D

Kiến thức về so sánh

Đề bài: Khi tỷ lệ thất nghiệp cao, tỷ lệ tội phạm cũng thường cao.

A. Tỷ lệ thất nghiệp và tỷ lệ tội phạm đều cao.

B. Tỷ lệ thất nghiệp cao như tỷ lệ tội phạm.

C. Tỷ lệ thất nghiệp cao phụ thuộc vào tỷ lệ tội phạm cao.

D. Tỷ lệ thất nghiệp càng cao thì tỷ lệ tội phạm càng gia tăng.

So sánh kép:

The + adj(er) – tính từ ngắn + S + V, the + adj(er) - tính từ ngắn + S + V

The + more + adj - tính từ dài + S +V, the + more + adj – tính từ dài + S +V

14 tháng 2 2017

Đáp án B.

Dịch câu đề: Khi tỉ lệ sinh cao, kỳ vọng về cuộc sống thấp.

Đáp án A sai về nghĩa.

Đáp án C sai vì trong đề không có dẫn chứng về tỉ lệ 2 cái là như nhau.

Đáp án D sai vì không có tỷ lệ nào phụ thuộc tỷ lệ nào

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 from 30 to 34. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies,...
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 from 30 to 34.

As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.

Heart failure, for example appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980s and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart-stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M and 10 A.M.

In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered.

Which of the following is NOT cited as a possible risk factor?

A. having a birthday

B. getting married 

C. eating fatty foods

D. being under stress

1
31 tháng 5 2018

Cái nào dưới đây không được trích dẫn như một nguyên nhân tiềm ẩn gây ra đau tim?

A. tổ chức sinh nhật                                       B. kết hôn

C. ăn đồ có nhiều chất béo                             D. bị căng thẳng

Thông tin:

- High-fat diets and „life in the fast lane’

- In other studies, both birthdays and bachelorhood

Tạm dịch:

- Khẩu phần ăn có nhiều chất béo và cuộc sống hối hả (căng thẳng)

- Trong các nghiên cứu khác, cả sinh nhật và cuộc sống của người chưa có vợ.

Chọn B

 ĐỀ THI CHỌN HỌC SINH GIỎI TIẾNG ANH LỚP 7 TRƯỜNG THCS TIÊN LỮ NĂM HỌC 2014-2015. I, Phonetics: 1, Choose the word which has the underlined part differently pronounced from the others(1,0p) 1. A-seat         B-read                       C-area            D-overseas2. A-birthday               B-AprilC-thirdD-invite3. A-kichenB-coachC-changeD-mechanic4. A-questionB-celebrationC-collectionD-invitation5. A-holdB-hourC-honeyD-hundred6....
Đọc tiếp

 

ĐỀ THI CHỌN HỌC SINH GIỎI TIẾNG ANH LỚP 7 TRƯỜNG THCS TIÊN LỮ

NĂM HỌC 2014-2015.

 

I, Phonetics:

 

1, Choose the word which has the underlined part differently pronounced from the others(1,0p)

1. A-seat         B-read                       C-area            D-overseas

2. A-birthday               B-AprilC-thirdD-invite

3. A-kichenB-coachC-changeD-mechanic

4. A-questionB-celebrationC-collectionD-invitation

5. A-holdB-hourC-honeyD-hundred

6. A-drugB-futureC-usefulD-computer

7. A-thousandB-aroundC-souvenirD-about

8. A-laughedB-ploughedC-coughedD-sunbathed

9. A-copiedB-studiedC- worriedD- prevented

10. A-teenagerB-togetherC-guestD-regularly

 

2, Choose the word which has the different stress from the others (0,5p)

1, A- explainB-surgeryC-improveD-material

2, A-measureB-preferC- periodD-distance

3, A- addressB-amazingC-authorD-complain

4, A-eventB-essayC-complimentD-employee

5, A-surprisingB-terribleC- awfulD-furnished

 

II, VOCABULARY AND STRUCTURES:

 

1, Choose the best option(1,5p)

1, When he is at school. He always wear……… uniform

A-the

B-an

C-a

D-A+B

2, Look! The plane is flying to Noi Bai airport. It ………….

A-will land

B-is going landing

C-intend to lend

D-is landing

3, Her father …………………..

A-bought for her a cap

B-bought a cap to her

C-buy her a cap

D-bought a cap for her

4, you/ watch/ football match/ TV/ yesterday/ night?

A- Did you watch a football match on TV yesterday night?

B- Do you watch a football match on TV yesterday night?

C- Did you watch a football match on TV yesterday last night?

D- Did you watch a football match on TV at night yesterday ?

5, You …….last Saturday.

A-have flu

B-had flu

C-got flu

D-catch flu

6, her/ what/ sister’s/ is/ weight/ friend’s/ ?

A-What is her friend’s sister weight?

B-What is her  sister’s friend’sweight?

A-What is her sister friend’s weight?

A-What is her sister’s weight friend’s  ?

7,

A- How heavy is your brother

B- How much does your brother weigh?

C- What’s your brother’s weight?

D-all are correct

 

8, He stopped in front of the gas station ………..some petrol an hour ago

A-getting

B-to get

C-got

D-would get

9, How much does it ………to mail a local letter?

A-take

B-pay

C-cost

D-price

10, We have fun …………. together on the farm evey year.

A-working

B-to work

C-to working

D-all are incorrect

11, He is reading comics with great ………………

A-please

B-pleasant

C-pleasure

D-pleased.

12, Mr John ……..the gardening when he was sicteen

A-made

B-did

C-took

D-worked

13, Will you please …………..home?

A-give me a pen

B-give me a ride

C-take me a ride

D-B+C

14, Is she very ……with wearing skirts?

A-popular

B-busy

C-famous

D-used

15, I’ll phone her ….I get home

A-if

B-as soon as

C-as

D-while

 

2, Give the correct form of the words to complete the sentences below.(1,0p)

1, I have ( little)….. time to play soccer than he does.

2, We will take part in ( act)…. a play for our school anniversary celebration.

3,That (music) ……..plays a lot of instruments.

4, (Art)…. paint beautiful pictures.

5, Thanks for ( invite)……..me to your wedding.

6, They (celebrate)…….their wedding for ten years and many people attended their( celebrate)…..

7, Did many (visit)…. come to Hue last year?

8, Yesterday night I had a slight fever and a (run)………. nose.

9,People feel (please) ……when they catch the common cold.

10, This building is very beautiful but it is ( safe) ……….for people to live in .  

 

3, Find out an error and correct it (1,0p)

1, How high large modern the bridge is !

2, Do you think she is going to appear in the meeting tonight?

3, Lan didn’t join her classmate’s party and so did Mai.

4, This kichen is more lovely and more pretty than yours.

5, Your children always talking in Math class.

6, Could she tell me how to get to the city center?

7, What did he eat for dinner? He eats rice , vegetable and boiled eggs.

8, Did you and your friends  meet a headache?

9, Lien with her children are showering in the bathroom.

10, They may perhaps keep awake if there’s a strange noise.

 

4, Fill the suitable prepositions in the blanks(1,0p)

1, Where are you going ………..your holidays?

2, My friend – Quang is afraid …..snakes.

3, Children are looking forward ……..their summer holiday.

4, She was good at drawing and swimming when she was …the age of thirteen.

5, My friend took me …the temple last Saturday

6, Were you very tired …………the trip last month?

7, The shirt is yellow ….white flowers …..it.

8, They stopped ……..the restaurant …..a while.

 

III, READING.

 

1, Fill one suitable word to complete the passage.(1,0p)

          I’d like to tell you about my family. My Dad is fifty five . He’s (1)…older than my Mom. She is only forty two. My father has his (2) …business. Mom (3)….. him with the business. I have two brother and a sister, so we are six (4) …us altogether in the family.

         My (5)……brother is Jack. He’s twenty six . He is (6)….and has two children. My sister Marie is the (7)…older . She’s twenty one years old. She’s an accountant and she works in a bank. Next to her is (8)….. I’m (9) …..my second year of university. The next youngest is Jame. He’s thirteen. He(10)……to secondary school.

 

2, Read the text and choose the best option.(1,0p)

Our class are going (1)… a trip to the mountains. Everyone (2)….bringing some thing to eat(3)…. to drink. Kate is bringing some bread and oranges. Mary is bringing some bananas and eggs. Liz is bringing ten apples and two big (4)…of Coca cola. Peter is bringing a lot of meat and I am bringing some orange juice, pork and chicken. Now we (5)…hungry . We are sitting (6)….. a big tree and (7)…… lunch. Peter is eating a lot (8)….. he doesn’t have breakfast. We are talking and laughing a lot (9)….. we are eating. (10)…… we have lunch, we go hiking in the mountains.

Every one of us are happy because we are having a lot of fun

1, A-on

B-in

C-to

D-for

2, A-are

B-is

C-likes

D-enjoy

3, A-and

B-both

C-or

D-0

4, A-cans

B-bottles

C-packets

D-boxes

5, A-are feeling

B-feel

C-are

D-B+C

6, A-on

B-below

C-under

D-beneath

7, A-taking

B-cooking

C-having

D-preparing

8, A-and

B-so

C-as

D-if

9, A-when

B-as soon as

C-because

D-while

10, A-After

B-Then

C-Before

D-Finally

 

IV, WRITING

 

1, Rewrite the sentences without chaning their meaning.(1,0p)

1, I get to work in half an hour by bike.

It ……………………………………………….

2, How much were these books ?

What…………………………………………..?

Did your classmates enjoy listening to music?

Were…………………………………………………?

3, They had a two-week summer vacation

Their…………………………………………………..

4, She’ll probably take an English course for six weeks.

She ………………………………………………………..

5, It isn’t important for you to finish the work

You don’t ……………………………………………..

6, She works more hours than him (many)

……………………………………………………….

7, Aren’t you going hiking next weekend?(of)

……………………………………………………………?

8, Mr Jack produces the most rice of all farmers.

No ………………………………………………………..

9, How long did it take her to travel to her hometown?

How…………………………………………………………?

10, It is impossible for the boys to play soccer here

The ……………………………………………………………..

 

2, Rearrange the words or phrases to make the meaningful sentences.(1,0p)

1, takes/ father/ it/ my/ to/ learn/ speak/ English/ three/ months/ to.

2, please/ three/ I/ have/ local/ can/ stamps ?

3, week/ they/ a / moved/ new/ Ha Noi/ last/ to/ apartment/in .

4, not/ keep/ difficult/ will/ to/ in/ be/ too/ touch/ each other/it/ with.

5, always when/ we/ with/ them/ we/ speak/ meet/ English/ them.

6, good/ what/ play/ you / a/ rehearsing/ , girls/ are !.

7, I / to/ before/ camping/ Shall/ go/ take/ the/ you/ dentist’s ?

8, studying/ we/ lots/ together/ on/ had/ weekends/ of/ fun .

9, in /with / Does/ behave/ her/ lovely/ she/ a / seldom/ way / neighbors/?

10, walk/ tonight/ has/ a/ he/ go/ to/ with/ girl friend/ out/ his/for/.

 

14
16 tháng 4 2016

nhiều quá ai mà giải nổi hả bạn, bạn chịu khó ghi ra từng câu rồi mọi người sẽ giải giúp bạn nhé !!

16 tháng 4 2016

ko dc

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 from 30 to 34. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies,...
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 from 30 to 34.

As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.

Heart failure, for example appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980s and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart-stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M and 10 A.M.

In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered.

Which of the following does the passage infer?

A. We now fully understand how risk factors trigger heart attacks.

B. We recently began to study how risk factors trigger heart attacks.

C. We have not identified many risk factors associated with heart attacks.

D. We do not fully understand how risk factors trigger heart attacks.

1
14 tháng 2 2017

Cái nào dưới đây có thể được suy luận ra từ bài đọc?

A. Bây giờ chúng ta đã hoàn toàn hiểu được hết những nguy cơ này đã dẫn đến những cơn đau tim như thế nào.

B. Gần đây chúng ta mới bắt đầu nghiên cứu những nguy cơ đó đã dẫn đến cơn đau tim như thế nào.

C. Chúng ta vẫn chưa xác định được nhiều nguy cơ dẫn đến cơn đau tim.

D. Chúng ta vẫn chưa hiểu được hết những nguy cơ tiềm ẩn này dẫn đến các cơn đau tim như thế nào.

Thông tin: […] intense research continues in the hope of further comprehending why and how heart failure is triggered.

Tạm dịch: […] những nghiên cứu kĩ hơn sẽ tiếp tục với hi vọng có thể hiểu thêm tại sao và như thế nào dẫn đến các cơn suy tim.

Chọn D

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 from 30 to 34. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies,...
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 from 30 to 34.

As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.

Heart failure, for example appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980s and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart-stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M and 10 A.M.

In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered.

The phrase “susceptible to” could best be replaced by 

A. aware of

B. affected by

C. prone to 

D. accustomed 

1
20 tháng 9 2018

Từ “susceptible to” có thể được thay thế bởi _____.

A. aware of: có nhận thức về

B. affected by: bị ảnh hưởng bởi

C. prone to: có khả năng/nguy cơ sẽ bị ảnh hưởng bởi

D. accustomed + to: quen thuộc với việc gì

Thông tin: In addition, people are more susceptible to heart attacks in the first few hours after waking.

Tạm dịch: Thêm vào đó, mọi người dễ bị đau tim trong một vài giờ đầu tiên khi mới tỉnh dậy.

Chọn C

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 from 30 to 34. As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies,...
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 from 30 to 34.

As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and „life in the fast lane” have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.

Heart failure, for example appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980s and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart-stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M and 10 A.M.

In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered.

What does the passage mainly discuss? 

A. cardiology in the 1980s

B. risk factors in heart attacks

C. diet and stress as factors in heart attacks

D. seasonal and temporal patterns of heart attacks

1
7 tháng 10 2019

Ý chính của bài đọc này là gì?

A. tim mạch học vào những năm 1980

B. nhân tố rủi ro dẫn đến các cơn đau tim

C. khẩu phần ăn và sự căng thẳng và các nhân tố gây ra đau tim

D. những cơn đau tim theo mùa và theo thời gian

Chọn 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.            Living things include both the visible world of animals and plants as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered.  Organisms have an enormously complex organization. Life can also “work”. Living creatures can take in energy from the environment. This energy, in the form of...
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. 

          Living things include both the visible world of animals and plants as well as the invisible world of bacteria and viruses. On a basic level, we can say that life is ordered.  Organisms have an enormously complex organization. Life can also “work”. Living creatures can take in energy from the environment. This energy, in the form of food, is changed to maintain metabolic processes and for survival. Life grows and develops. This means more than just getting larger in size. Living organisms also have the ability to rebuild and repair themselves when injured.  Life can reproduce. Life can only come from other living creatures. Life can respond.  Think about the last time you accidentally stubbed your toe. Almost instantly, you moved back in pain. Finally, life can adapt and respond to the demands placed on it by the environment. There are three basic types of adaptations that can occur in higher organisms.

          Reversible changes occur as a response to changes in the environment. Let's say you live near sea level and you travel to a mountainous area. You may begin to experience difficulty breathing and an increase in heart rate as a result of the change in height. These signs of sickness go away when you go back down to sea level.

          Body- related changes happen as a result of prolonged changes in the environment. Using the previous example, if you were to stay in the mountainous area for a long time, you would notice that your heart rate would begin to slow down and you would begin to breath normally. These changes are also reversible. Genotypic changes (caused by genetic change) take place within the genetic make up of the organism and are not reversible. An example would be the development of resistance to bug-killing chemicals by insects and spiders.

Which of the followings is NOT a feature of life?

A. Getting a job.

B.  Giving birth.

C.  Getting larger and self-repairing. 

D.  Reacting to the environment.

1
28 tháng 11 2017

Đáp án A

Câu nào dưới đây KHÔNG phải là đặc trưng của sự sống?

A. Có một công việc

B. Sinh sản

C. Lớn lên và tự hồi phục.

D. Phản ứng với môi trường

Dẫn chứng ở đoạn 1: “Life grows and develops. This means more than just getting larger in size (C). Living organisms also have the ability to rebuild and repair themselves (C) when injured. Life can reproduce(B).Life can only come from other living creatures. Life can respond (D)” – (Sự sống lớn lên và phát triển. Có nghĩa là hơn cả việc kích thước càng ngày càng lớn thêm. Các sinh vật sống còn có khả năng tự phục hồi khi bị thương. Sự sống có thể sinh sản. Sự sống chỉ có thể đến từ các sinh vật sống khác. Sự sống có thể phản ứng).

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 from 35 to 42.  Biological diversity has become widely recognized as a critical conservation issue only in the past two decades. The rapid destruction of the tropical rain forests, which are the ecosystems with the highest known species diversity on Earth, has awakened people to the importance and fragility of biological diversity. The high rate of species...
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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 answer to each of the questions from 35 to 42.

  Biological diversity has become widely recognized as a critical conservation issue only in the past two decades. The rapid destruction of the tropical rain forests, which are the ecosystems with the highest known species diversity on Earth, has awakened people to the importance and fragility of biological diversity. The high rate of species extinctions in these environments is jolting, but it is important to recognize the significance of biological diversity in all ecosystems. As the human population continues to expand, it will negatively affect one after another of Earth’s ecosystems. In terrestrial ecosystems and in fringe marine ecosystems (such as wetlands), the most common problem is habitat destruction. In most situations, the result is irreversible. Now humans are beginning to destroy marine ecosystems through other types of activities, such as disposal and runoff of poisonous waste; in less than two centuries, by significantly reducing the variety of species on Earth, they have irrevocably redirected the course of evolution.

  Certainly, there have been periods in Earth’s history when mass extinctions have occurred. The extinction of the dinosaurs was caused by some physical event, either climatic or cosmic. There have also been less dramatic extinctions, as when natural competition between species reached an extreme conclusion. Only 0.01 percent of the species that have lived on Earth have survived to the present, and it was largely chance that determined which species survived and which died out.

          However, nothing has ever equaled the magnitude and speed with which the human species is altering the physical and chemical world and demolishing the environment. In fact, there is wide agreement that it is the rate of change humans are inflicting, even more than the changes themselves, that will lead to biological devastation. Life on Earth has continually been in flux as slow physical and chemical changes have occurred on Earth, but life needs time to adapt-time for migration and genetic adaptation within existing species and time for the proliferation of new genetic material and new species that may be able to survive in new environments.

The word “jolting” is closest in meaning to _____________ .

A. illuminating

B. unknown

C. shocking

D. predicted

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2 tháng 11 2017

ĐÁP ÁN C