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6 tháng 7 2019

1. C. had been

2. comes

( ko bt nên dùng V j đại loại nó sẽ chia ở thì HTĐ/ HTHT )

7 tháng 7 2019

S + will + V + As soon As/ after/ until + S + V(s/es)

1. Find ONE word only which fits in all THREE sentences. 1.A It is essential that students develop an ..................... of how the internet can be used. B There was an almost complete lack of ..................... of the issues involved. C The campaign is to raise public ..................... of the importance of eating a healthy diet. 2. A We expect John to contact me with the details of the plan but as ..................... we haven't heard from him. B A change in the law has been...
Đọc tiếp

1. Find ONE word only which fits in all THREE sentences.

1.A It is essential that students develop an ..................... of how the internet can be used.

B There was an almost complete lack of ..................... of the issues involved.

C The campaign is to raise public ..................... of the importance of eating a healthy diet.

2. A We expect John to contact me with the details of the plan but as ..................... we haven't heard from him.

B A change in the law has been agreed but the government have................... to announce exactly when it will come into force.

C Jack has a good job, and ..................... he never seems to have any money.

3. A The new office block has become an expensive .....................elephant. What a waste of money!

B The government must be whiter than ..................... to win the support of the people.

C The novel is about her experiences as a black girl in a predominantly..................... city. ,

4. A The accident could have been much worse; luckily no serious ..................... was done.

B These revelations will..................... his chances of winning the election next term.

C The treatment they gave him turned out to do him much ..................... than good.

5. A As soon as I receive payment I will................ the book to you.

B It was your grandfather's..................... wish that you should have his gold watch after he died

C Words cannot..................... how pleased I am when my son wins that prize in the contest.

giúp mk vs mk rất gấp !

2
6 tháng 1 2018

1. Find ONE word only which fits in all THREE sentences.

1.A It is essential that students develop an awareness of how the internet can be used.

B There was an almost complete lack of awareness of the issues involved.

C The campaign is to raise public awareness of the importance of eating a healthy diet.

2. A We expect John to contact me with the details of the plan but as yet we haven't heard from him.

B A change in the law has been agreed but the government have yet to announce exactly when it will come into force.

C Jack has a good job, and yet he never seems to have any money.

3. A The new office block has become an expensive white elephant. What a waste of money!

B The government must be whiter than white to win the support of the people.

C The novel is about her experiences as a black girl in a predominantly white city. ,

4. A The accident could have been much worse; luckily no serious harm was done.

B These revelations will harm his chances of winning the election next term.

C The treatment they gave him turned out to do him much harm than good.

5. A As soon as I receive payment I will express the book to you.

B It was your grandfather's ​express wish that you should have his gold watch after he died

C Words cannot ​express how pleased I am when my son wins that prize in the contest.

6 tháng 1 2018

1. Find ONE word only which fits in all THREE sentences.

1.A It is essential that students develop an ............awareness......... of how the internet can be used.

B There was an almost complete lack of ............awareness......... of the issues involved.

C The campaign is to raise public ..........awareness........... of the importance of eating a healthy diet.

2. A We expect John to contact me with the details of the plan but as ............yet......... we haven't heard from him.

B A change in the law has been agreed but the government have.........yet.......... to announce exactly when it will come into force.

C Jack has a good job, and .........yet............ he never seems to have any money.

3. A The new office block has become an expensive ...............white.....elephant. What a waste of money!

B The government must be whiter than .........white............ to win the support of the people.

C The novel is about her experiences as a black girl in a predominantly.........white............ city. ,

4. A The accident could have been much worse; luckily no serious ............harm......... was done.

B These revelations will.........harm............ his chances of winning the election next term.

C The treatment they gave him turned out to do him much ...........harm......... than good.

5. A As soon as I receive payment I will.......express......... the book to you.

B It was your grandfather's.........express............ wish that you should have his gold watch after he died

C Words cannot..........express........... how pleased I am when my son wins that prize in the contest.

24 tháng 11 2019

Chọn đáp án đúng:

1. The water in this swimming pool .... to cold. A. are feeling B. feel C. feels D. was feeling

2. The articles that John has written ..... difficult to understand.

A. has been B. was C. are D. is

3. The clothes in this box .... to my sister.

A. belong B. was belonging C. is belonging D. belongs

4. ..... cats as faithful as dogs? A. Be B. Is C. Am D. Are

5. Two thirds of the land ..... already been sold.

A. is B. are C. has D. have

6. He is learning ten dollars an hour, which ..... not a small amount of money.

A. be B. to be C. is D. are

7. His answers to the questions ...have been changed.. (change) so far.

8. The English ....like. (like) to drink tea.

9. Much progress ..has been made.. (have) been made in recent weeks.

10. Both of the girls .are.. (be) pretty, but neither of them ..is.. (be) intelligent.

24 tháng 11 2019

Hồ Bảo Trâm, Nguyễn Khánh Linh, Hoàng Minh Nguyệt, Cuồng Khải Nguyên, Trà My, Nguyễn Nhật Minh, Tú Quyên, Nguyễn Hoàng Minh, Đức Minh, Võ Bảo Vân, Nguyễn Minh Huyền, ...

31 tháng 12 2019

1c

2d

3d

4a

V. Choose the correct answers. 1.Nam.......my uncle yesterday. a.visit b.visits c. was visiting d. visited 2, She ........ here two days ago. a, didn't come b. doesn't come c. comes d,come 3. .......... to the library last Monday ? a, do you do b, did you do c, you went d, are you going 4, We....... Joan at the party ? She .... a red dress. a.Do you meet / wears b, Did you meet / wears cDo you meet /...
Đọc tiếp

V. Choose the correct answers.

1.Nam.......my uncle yesterday.

a.visit b.visits c. was visiting d. visited

2, She ........ here two days ago.

a, didn't come b. doesn't come c. comes d,come

3. .......... to the library last Monday ?

a, do you do b, did you do c, you went d, are you going

4, We....... Joan at the party ? She .... a red dress.

a.Do you meet / wears b, Did you meet / wears

cDo you meet / was wearing d, Did you meed / was wearing

5, What ........ When I ..... you last night ?

a, did you do / was phoning b, did you do / phoned

c, were you doing / phone d, were you doing / phoned

6, Where ....... you yesterday afternon ? I ..... at my uncle's house.

a, are/ am b,was/was c, were/ were d,were/ was

7, When I walked into the room , it was empty . But there was a smell of cigarettes. Somebody..... in the room.

a, was smoking b, were smoking c, has been smoking d, had been smoking

8. When I arrived at the party. Tom ...... home.

a, has already gone b, had already gone

c,already has gone d, had gone already

9,When Mary came back from the beach , she look very very red from the sun, She ....... in the sun too lonh.

a. had been lying b, was lying c, lay d, has been lying

2
16 tháng 12 2018

1 D

2 A

3 B

4 D

5 D

6 D

7 A

8 A

9 D

3 tháng 1 2019

V. Choose the correct answers.

1.Nam.......my uncle yesterday.

a.visit

b.visits

c. was visiting

d. visited

2, She ........ here two days ago.

a. didn't come

b. doesn't come

c. comes

d. come

3. .......... to the library last Monday ?

a. do you do

b. did you do

c. you went

d. are you going

4. We....... Joan at the party ? She .... a red dress.

a. Do you meet / wears

b. Did you meet / wears

c. Do you meet / was wearing

d. Did you meed / was wearing

5. What ........ When I ..... you last night ?

a, did you do / was phoning b, did you do / phoned

c, were you doing / phone d, were you doing / phoned

6, Where ....... you yesterday afternon ? I ..... at my uncle's house.

a, are/ am b,was/was c, were/ were d,were/ was

7, When I walked into the room , it was empty . But there was a smell of cigarettes. Somebody..... in the room.

a, was smoking b, were smoking c, has been smoking d, had been smoking

8. When I arrived at the party. Tom ...... home.

a, has already gone b, had already gone

c,already has gone d, had gone already

9,When Mary came back from the beach , she look very very red from the sun, She ....... in the sun too long.

a. had been lying b, was lying c, lay d, has been lying

[không biết đúng không .-.]

13 tháng 9 2019

giúp mình với mình đang cần gấp

20 tháng 9 2019

II Choose the best answer for each sentence

1 My mother ..................to the market at 9: 00 am every day

A goes B went C go D has gone

2 Our principal..................to thailand several times

A was B had been C is D has been

3 I ...............do morning exercise because it is good for my health

A rarely B seldom C never D always

4 .................went along with Jenny at your party last night ?

A what B who C When D why

5 My mother got very angry this morning because our cat ..............her favorite vase

A breaks B was breaking C had broken D has broken

6 Tom enjoys ................books in his free time

A read B reading C to read D reads

7 Her grandfather .........two years ago

a dies B had died C died D has died

8 Would you mind ............off the television now ?

A turn B turning C to turn D turned

Transformation: 1. The truth only came out on the publication of the general's personal diaries. -> Only when... 2. She didn't write to her parents until she found a job. -> Not till... 3. They won't let you enter the retical hall until you have tickets. -> Only when... 4. He forgot about the gun until he got home. -> Not until... 5. The refugees continued to feel unsafe until they had crossed the border. -> Not until... 6. We only dispatch goods after receiving the moeny. -> Only...
Đọc tiếp

Transformation:

1. The truth only came out on the publication of the general's personal diaries.

-> Only when...

2. She didn't write to her parents until she found a job.

-> Not till...

3. They won't let you enter the retical hall until you have tickets.

-> Only when...

4. He forgot about the gun until he got home.

-> Not until...

5. The refugees continued to feel unsafe until they had crossed the border.

-> Not until...

6. We only dispatch goods after receiving the moeny.

-> Only when...

7. The telephone rang just after he left the room.

-> No sooner...

8. He got married as soon as he graduated from the college.

-> Hardly...

9. You won't find a school anywhere whose pupils get such results.

-> Nowher...

10. It was the most beautiful place I had ever visited.

-> Never before...

11. A cat sat on the TV.

-> On...

12. Love comes first, then marriage comes.

-> First...

13. She left so quickly that we didn't even realize she was gone.

-> So...

14. You should write dwn your thoughts in no circumstances.

-> Under...

15. If there had been more rain, our crop would have been better.

-> Had...

16. My baby daughter was beautiful beyond belief.

-> Beautiful...

17. The priceless Victorian desk was not lost among the old tables and chairs.

-> Lost...

18. She had no idea that he was unfaithful to her.

-> Little...

19. Immediately he returned from his run, he had to re-organise the morning schedule.

-> Scarcly...

1
20 tháng 7 2020

1. Only when the general's personal diaries was published did the truth come out

2. Not until she found a job did she write to her parents.

3. Only when you have tickets will they let you enter the retical hall

4. Not until he got home did he forget about the gun

5. Not until the refugees had crossed the border did they stop feeling unsafe

6. Only when we receive the money do we dispatch goods

7. No sooner had the telephone rung than he left the room

8. Hardly had he graduated from the college when he got married

9. Nowhere will you find a school whose pupils get such results

10. Never before had I visited such beautiful place

11. On the TV sat a cat

12. First comes love, then comes marriage.

13. So quickly did she leave that we didn't even realize she was gone

14. Under no circumstances should you write down your thoughts

15. Had there been more rain, our crop would have been better

16. Beautiful beyond belief was my baby daughter

17. Lost among the old tables and chairs was the priceless Victorian desk

18. Little did she have idea that he was unfaithful to her

19. Scarely had he returned from his run when he had to re-organise the morning schedule

Chọn đáp án đúng: 1. The teacher ..... French and English. (know/ knows) 2. Of all the countries in that area of the world, perhaps Nigeria .... the most potential (have/ has) 3. Despite the bad weather we have had in the past days, there ..... no doubt that the tournament will go on. (is/ are) 4. Neither the student nor the teacher ..... about what happens on this trip. (care/ cares) 5. The large companies in our area .... cheap source of labor. (need/ needs) 6. Never .... the...
Đọc tiếp

Chọn đáp án đúng:

1. The teacher ..... French and English. (know/ knows)

2. Of all the countries in that area of the world, perhaps Nigeria .... the most potential (have/ has)

3. Despite the bad weather we have had in the past days, there ..... no doubt that the tournament will go on. (is/ are)

4. Neither the student nor the teacher ..... about what happens on this trip. (care/ cares)

5. The large companies in our area .... cheap source of labor. (need/ needs)

6. Never .... the weather been so bad in the month of Junes and July. (has/ have)

7. Without the new taxes, houses built before World War II .... lower costs than more modern houses do. (have/ has)

8. According to the information on this page, items bought before 1940 ___ more than items made after that year. (is/ are)

9. Everyone selected to serve on this jury _____ to be willing to give up a lot of time. (have/ has)

10. Not only the students but also their instructor ..... been called to the principal's office. (have/has)

11. Most of the milk ..... gone bad. Six gallons of milk ..... still in the refrigerator. (has - are/ have - is)

12. Rice and beans, my favourite dish, ..... me of my native Puerto Rico. (remind/ reminds)

13. To an outside, the economics of this country ..... to be in disarray. (seem/ seems)

14. Of all her books, none .... sold as well as the first one. (have/ has)

15. The music that they listen to .... them to relax.

A. help B. are helping C. helps D. helping

2
24 tháng 11 2019

Chọn đáp án đúng:

1. The teacher ..... French and English. (know/ knows)

2. Of all the countries in that area of the world, perhaps Nigeria .... the most potential (have/ has)

3. Despite the bad weather we have had in the past days, there ..... no doubt that the tournament will go on. (is/ are)

4. Neither the student nor the teacher ..... about what happens on this trip. (care/ cares)

5. The large companies in our area .... cheap source of labor. (need/ needs)

6. Never .... the weather been so bad in the month of Junes and July. (has/ have)

7. Without the new taxes, houses built before World War II .... lower costs than more modern houses do. (have/ has)

8. According to the information on this page, items bought before 1940 ___ more than items made after that year. (is/ are)

9. Everyone selected to serve on this jury _____ to be willing to give up a lot of time. (have/ has)

10. Not only the students but also their instructor ..... been called to the principal's office. (have/has)

11. Most of the milk ..... gone bad. Six gallons of milk ..... still in the refrigerator. (has - are/ have - is)

12. Rice and beans, my favourite dish, ..... me of my native Puerto Rico. (remind/ reminds)

13. To an outside, the economics of this country ..... to be in disarray. (seem/ seems)

14. Of all her books, none .... sold as well as the first one. (have/ has)

15. The music that they listen to .... them to relax.

A. help B. are helping C. helps D. helping

24 tháng 11 2019

Cuồng Khải Nguyên, Thảo Phương , Hồ Bảo Trâm, Nguyễn Khánh Linh, Hoàng Minh Nguyệt, Tử Đằng, Nguyễn Phương Trâm, Phạm Hoàng Giang, Võ Bảo Vân, Trà My, Nguyễn Minh Huyền, Đức Minh, Nguyễn Nhật Minh, Nhiên An Trần, Nguyễn Hoàng Minh, Tú Quyên, ...

Chọn câu hỏi đúng? 1. To stay healthy or become stronger, you should __________ regularly. A. eat B. go C. exercise D. drink 2. When my father was young, he ______ get up early to do the gardening. A. used to B. was used to C. got used to D. use to 3. Cameron, ______ directed “ The Titanic”, is one of the leading faces in Hollywood. A. who ...
Đọc tiếp

Chọn câu hỏi đúng?

1. To stay healthy or become stronger, you should __________ regularly.

A. eat B. go C. exercise D. drink

2. When my father was young, he ______ get up early to do the gardening.

A. used to B. was used to C. got used to D. use to

3. Cameron, ______ directed “ The Titanic”, is one of the leading faces in Hollywood.

A. who B. whose C. whom D. that

4. He found a watch when he _____ in the street.

A. was walking B. had been walking C. had worked D. walked

5. Do you recognize the girls __________ at the school gate?

A. whom are chatting B. which are chatting C. that chatted D. who are chatting

6. The paintings ________Mr Flowers has in his house are worth around 100,000 dollars

A. what B. which C. whom D. whose

7. Last month. Mr. Donald Trump, ______ is the president of the US, visited Vietnam and had a wonderful time in this country.

A. that B. who C. whose D. which

8. Have you ever read any books by the writer ____ the teacher mentioned in class yesterday?

A. which B. whose C. what D. whom

9. These students, ________ come to my night class, are very eager to learn.

A. whose B. who C. that D. which

10. The mother told her son ______ so impolitely.

A. not behaving B. not to behave C. did not behave D. not behave

Giúp mình với hứa sẽ tick!

1
5 tháng 4 2020

1. To stay healthy or become stronger, you should __________ regularly.

A. eat B. go C. exercise D. drink

2. When my father was young, he ______ get up early to do the gardening.

A. used to B. was used to C. got used to D. use to

3. Cameron, ______ directed “ The Titanic”, is one of the leading faces in Hollywood.

A. who B. whose C. whom D. that

4. He found a watch when he _____ in the street.

A. was walking B. had been walking C. had worked D. walked

5. Do you recognize the girls __________ at the school gate?

A. whom are chatting B. which are chatting C. that chatted D. who are chatting

6. The paintings ________Mr Flowers has in his house are worth around 100,000 dollars

A. what B. which C. whom D. whose

7. Last month. Mr. Donald Trump, ______ is the president of the US, visited Vietnam and had a wonderful time in this country.

A. that B. who C. whose D. which

8. Have you ever read any books by the writer ____ the teacher mentioned in class yesterday?

A. which B. whose C. what D. whom

9. These students, ________ come to my night class, are very eager to learn.

A. whose B. who C. that D. which

10. The mother told her son ______ so impolitely.

A. not behaving B. not to behave C. did not behave D. not behave

Read the text and choose the answer (A, B, C or D) which you think fits best according to the text. (10pts) Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billion years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life.What forms of life were able to make such a drastic change in lifestyle?...
Đọc tiếp

Read the text and choose the answer (A, B, C or D) which you think fits best according to the text. (10pts) Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billion years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life.What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on mega fossils-relatively large specimens of essentially whole plants and animal. Vascular plants, related to modern seed plants and ferns, left the first comprehensive mega fossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that fed on the plants, and lastly by animals that preyed on the plant-eater. Moreover,the mega fossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago.Recently, however, paleontologists have been taking a closer look at the sediments below this Silurian-Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rocks in an acid bath. The technique has uncovered new evidence from sediments that were deposited near the shores of the ancient oceans-plant microfossils and microscopic pieces of small animals. In many instances the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of the fossils consist of the organic remains of the organism.These newly discovered fossils have not only revealed the existence of previously unknown organisms, but have also pushed back these dates for the invasion of land by multi-cellular organisms. Our views about the nature of the early plant and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms.

11. The word "drastic" in line 5 is closest in meaning to

(A) widespread (B) radial (C) progressive (D) risky

12. According to the theory that the author calls "the traditional view", what was the first form of life to appear on land?

(A) Bacteria (B) Meat-eating animals

(C) Plant-eating animals (D) Vascular plants

13. According to the passage, what happened about 400 million years ago?

(A) Many terrestrial life-forms died out.

(B) New life-forms on land developed at a rapid rate.

(C) The mega fossils were destroyed by floods.

(D) Life began to develop in the ancient seas.

14. The word "extracted" in line 18 is closest in meaning to

(A) located (B) preserved (C) removed (D) studied

15. What can be inferred from the passage about the fossils mentioned in lines 17-20?

(A) They have not been helpful in understanding the evolution of terrestrial life.

(B) They were found in approximately the same numbers as vascular plant fossils.

(C) They are older than the mega fossils.

(D) They consist of modern life forms.
16. The word "instances" in line 21 is closest in meaning to

(A) methods (B) processes (C) cases (D) reasons

17. The word "they" in line 22 refers to

(A) rocks (B) shores (C) oceans (D) specimens

18. The word "entombed" in line 22 is closest in meaning to

(A) crushed (B) trapped (C) produced (D) excavated

19. Which of the following resulted from the discovery of microscopic fossils?

(A) The time estimate for the first appearance of terrestrial life-forms was revised

(B) Old techniques for analyzing fossils were found to have new uses.

(C) The origins of primitive sea life were explained.

(D) Assumptions about the locations of ancient seas were changed.

20. With which of the following conclusions would the author probably agree?

(A) The evolution of terrestrial life was as complicated as the origin of life itself.

(B) The discovery of microfossils supports the traditional view of how terrestrial life evolved.

(C) New species have appeared at the same rate over the course of the last 400 million years.

(D) The technology used by paleontologists is too primitive to make accurate determinations about ages of fossils.

1
24 tháng 4 2020

Read the text and choose the answer (A, B, C or D) which you think fits best according to the text. (10pts) Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billion years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life.What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on mega fossils-relatively large specimens of essentially whole plants and animal. Vascular plants, related to modern seed plants and ferns, left the first comprehensive mega fossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that fed on the plants, and lastly by animals that preyed on the plant-eater. Moreover,the mega fossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago.Recently, however, paleontologists have been taking a closer look at the sediments below this Silurian-Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rocks in an acid bath. The technique has uncovered new evidence from sediments that were deposited near the shores of the ancient oceans-plant microfossils and microscopic pieces of small animals. In many instances the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of the fossils consist of the organic remains of the organism.These newly discovered fossils have not only revealed the existence of previously unknown organisms, but have also pushed back these dates for the invasion of land by multi-cellular organisms. Our views about the nature of the early plant and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms.

11. The word "drastic" in line 5 is closest in meaning to

(A) widespread (B) radial (C) progressive (D) risky

12. According to the theory that the author calls "the traditional view", what was the first form of life to appear on land?

(A) Bacteria (B) Meat-eating animals

(C) Plant-eating animals (D) Vascular plants

13. According to the passage, what happened about 400 million years ago?

(A) Many terrestrial life-forms died out.

(B) New life-forms on land developed at a rapid rate.

(C) The mega fossils were destroyed by floods.

(D) Life began to develop in the ancient seas.

14. The word "extracted" in line 18 is closest in meaning to

(A) located (B) preserved (C) removed (D) studied

15. What can be inferred from the passage about the fossils mentioned in lines 17-20?

(A) They have not been helpful in understanding the evolution of terrestrial life.

(B) They were found in approximately the same numbers as vascular plant fossils.

(C) They are older than the mega fossils.

(D) They consist of modern life forms.
16. The word "instances" in line 21 is closest in meaning to

(A) methods (B) processes (C) cases (D) reasons

17. The word "they" in line 22 refers to

(A) rocks (B) shores (C) oceans (D) specimens

18. The word "entombed" in line 22 is closest in meaning to

(A) crushed (B) trapped (C) produced (D) excavated

19. Which of the following resulted from the discovery of microscopic fossils?

(A) The time estimate for the first appearance of terrestrial life-forms was revised

(B) Old techniques for analyzing fossils were found to have new uses.

(C) The origins of primitive sea life were explained.

(D) Assumptions about the locations of ancient seas were changed.

20. With which of the following conclusions would the author probably agree?

(A) The evolution of terrestrial life was as complicated as the origin of life itself.

(B) The discovery of microfossils supports the traditional view of how terrestrial life evolved.

(C) New species have appeared at the same rate over the course of the last 400 million years.

(D) The technology used by paleontologists is too primitive to make accurate determinations about ages of fossils.

#maymay#