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1. I ...............will see....... you tomorrow. (see)2. My father .......took.......... me to the zoo last week. (take)3. Nam often .................. games after school (play)4. He ...................his grandmother yesterday. (visit)5. They ...........................their homework at the moment. (do)6. What ...............you............... yesterday morning? (do)7. The children ..................(be) in class now, but ten minutes ago they ..................(be) in the school yard.8. Next...
Đọc tiếp

1. I ...............will see....... you tomorrow. (see)

2. My father .......took.......... me to the zoo last week. (take)

3. Nam often .................. games after school (play)

4. He ...................his grandmother yesterday. (visit)

5. They ...........................their homework at the moment. (do)

6. What ...............you............... yesterday morning? (do)

7. The children ..................(be) in class now, but ten minutes ago they ..................(be) in the school yard.

8. Next week, we ...............(have) dinner together.

VI. Viết lại câu mà không thay đổi nghĩa

1.    The cat is very lovely.

è What ....................................................................... !

2.    Let’s play a game.

è What about.............................................................................................?

3.    The cap had a picture of a dolphin on it.

è There was a...............................................................................................

4.    Liz helps me with my stamp collection.

è Liz helps me .............................................................................................

5.    She thought Vung Tau was beautiful

è She found ................................................................................................

6.    Liz is going to visit Ba next week

è Liz will ......................................................................................................

7.    No other fish is more beautiful than the colorful little fish

è The colorful little fish is ..............................................................................

8.    He hates cooking the meals

è He doesn’t ................................................................................................

9.    The neighbor is very nice

è What ..........................................................................................................

10.  A farmer has no real vacations

è A farmer doesn’t .........................................................................................

2
4 tháng 2 2021

Chào em, em tham khảo nhé!

1. I ...............will see....... you tomorrow. (see)

2. My father .......took.......... me to the zoo last week. (take)

3. Nam often ...plays... games after school (play)

4. He ...visited....his grandmother yesterday. (visit)

5. They ...are doing..their homework at the moment. (do)

6. What ..did....you....do.... yesterday morning? (do)

7. The children .....are.....(be) in class now, but ten minutes ago they ..were....(be) in the schoolyard.

8. Next week, we ....are going to have...(have) dinner together.

VI. Viết lại câu mà không thay đổi nghĩa

1.    The cat is very lovely.

=> What ........a lovely cat...........!

2.    Let’s play a game.

=> What about......playing a game.............?

3.    The cap had a picture of a dolphin on it.

=> There was a.....picture of a dolphin on the cap.........

4.    Liz helps me with my stamp collection.

=> Liz helps me ........collecting stamps...............

5.    She thought Vung Tau was beautiful

=> She found ......Vung Tau was beautiful..............

6.    Liz is going to visit Ba next week

=> Liz will ............plan to visit Ba next week........

7.    No other fish is more beautiful than the colourful little fish

=> The colourful little fish is .......the most beautiful.........

8.    He hates cooking the meals

=>  He doesn’t .......cook the meals..........

9.    The neighbour is very nice

=> What .......nice neighbour.........!

10.  A farmer has no real vacations

=>  A farmer doesn’t ......have any real vacations.............

Chúc em học tốt và có những trải nghiệm tuyệt vời tại olm.vn!

VI. Viết lại câu mà không thay đổi nghĩa

1.    The cat is very lovely.

=> What a lovely cat !

2.    Let’s play a game.

=> What about  playing a game ?

3.    The cap had a picture of a dolphin on it.

=> There was a picture of a dolphin on the cap

4.    Liz helps me with my stamp collection.

=>  Liz helps me collecting stamp

5.    She thought Vung Tau was beautiful

=> She found Vung Tau was beautiful

6.    Liz is going to visit Ba next week

è Liz will  to visit Ba next week

7.    No other fish is more beautiful than the colorful little fish

è The colorful little fish is the most beautiful

8.    He hates cooking the meals

è He doesn’t li ke to cook the meals

9.    The neighbor is very nice

è What a nice neighbor

10.  A farmer has no real vacations

è A farmer doesn’t have real vacations

7 tháng 8 2019

1.chats 2Did They see 2.don't eat 4Will Nam return 5.danced ,sang 6.will he go 7.Does...ride 8.are you waiting 9,do..do 10.did he fly 1-.is having 12.were you doing 13 Gets up 14 brushes 15 goes 16does...take 17.Will..see

30 tháng 3 2022

1. go

2. play

3. am/ will go

4. knows

5. stays

6. work

7. looks

8. are listening/ will call 

 

9 tháng 11 2018

1. Bill ( send ) sent a present to his mother on her birthday last week

2. The police ( catch ) caught the theif the day before yesterday

3. I ( buy ) bought two movie tickets yesterday. My friends and I ( see ) are going to see a movie tomorrow

4. What are you doing ? I ( play ) am playing " hide and seek " with my cousin

5. When I ( see ) saw him, he ( talk ) was talking to someone, so he ( not recognize ) didn't recognize me then

6. We ( go ) go to school 6 days a week, but we ( not have ) didn't have lessons yesterday because it was Sunday

9 tháng 11 2018

1. Bill ( send ).....sent......a present to his mother on her birthday last week

2. The police ( catch ).....caught......the theif the day before yesterday

3. I ( buy ).....bought....two movie tickets yesterday. My friends and I ( see )....are going to see....a movie tomorrow

4. What are you doing ? I ( play ).......am playing......." hide and seek " with my cousin

5. When I ( see )....saw...him, he ( talk ).......was talking.......to someone, so he ( not recognize )........didn't recognize......me then

6. We ( go ).........go........to school 6 days a week, but we ( not have ).....didn't have....lessons yesterday because it was Sunday

1. Where is your mother? – She is in the kitchen. She ______(cook) the dinner. 2. Your brother often ______ (go) to school by bus last year? 3. He often played football when he (be).....................young. 4. Trung is learning to play the guitar. He (have)...................guitar lessons twice a week. 5. Look! The plane (fly)............................ toward to the airport. It (land).......................... 6. Take these medicines and you (feel).................... better then,...
Đọc tiếp

1. Where is your mother? – She is in the kitchen. She ______(cook) the dinner.

2. Your brother often ______ (go) to school by bus last year?

3. He often played football when he (be).....................young.

4. Trung is learning to play the guitar. He (have)...................guitar lessons twice a week.

5. Look! The plane (fly)............................ toward to the airport. It (land)..........................

6. Take these medicines and you (feel).................... better then, Ha.

7. I.............. (have) a birthday party tomorrow evening. Would you like........... (come)?

8............. he........... (like) milk or tea?

9. Where is Nam?- He (watch)........................ TV in his room at the moment.

10. I often go to school by bicycle but today I........... (go) to school by bus.

11. My best friend (write).............................. me a letter several time.

12. If it (be)..............nice tomorrow. We (plant).......................some young trees.

13. -...................you ever (see)....................a real robot at work?

- No, never.

14. Do you think there (be)..................a city underwater?

15. I (never, see).............................such a big flower.

16. He (never meet).....................her before.

3
26 tháng 6 2017

1. Where is your mother? – She is in the kitchen. She ___IS COOKING___(cook) the dinner.

2. Your brother often ___GOES___ (go) to school by bus last year?

3. He often played football when he (be)...........WAS..........young.

4. Trung is learning to play the guitar. He (have)...........HAS........guitar lessons twice a week.

5. Look! The plane (fly)...........IS FLYING................. toward to the airport. It (land)..........IS LANING................

6. Take these medicines and you (feel)..........TO FEEL.......... better then, Ha.

7. I.......WILL HAVE....... (have) a birthday party tomorrow evening. Would you like.....TO COME...... (come)?

8.......DOES...... he......LIKE..... (like) milk or tea?

9. Where is Nam?- He (watch)............IS WATCHING............ TV in his room at the moment.

10. I often go to school by bicycle but today I....AM GOING....... (go) to school by bus.

11. My best friend (write).................WRITE............. me a letter several time.

12. If it (be)......WILL........nice tomorrow. We (plant)...........WILL PLANT............some young trees.

13. -...........DOES........you ever (see)..........SEE..........a real robot at work?

- No, never.

14. Do you think there (be)........IS..........a city underwater?

15. I (never, see).............NEVER SEE................such a big flower.

16. He (never meet).........NEVER MEETS............her before.

26 tháng 6 2017

Mk chỉ ghi đáp án cho bạn thui na,bạn thông cảm. 1.is cooking. 2. Does your brother often goes .....? 3.was 4.has 5.is flying ,is landing. 6.to feel 7.will have,to come 8.Does he like? 9.is watching 10.am going 11.writes 12.will,will plant 13.Have you ever seen...? 14.is 15.have never seen 16.has never met Chúc bạn hk tốt bạn Hà An mk thấy câu 15,16 bạn ý lm sai thì phải

64. I was taken to the zoo by my uncle last week.    A. My unle was taken me to the zoo last week   B. My uncle took me to the zoo last week.   C. My uncle took I to the zoo last week.   D. My uncle was take to the zoo last week.   65. She started to work in this factory 10 years agoA. She has started to  work in this factory 10 years ago.B. She has started to work in this factory for 10 years ago.C. She has worked in this factory for 10 years ago.D. She has worked in this factoryfor 10...
Đọc tiếp

64. I was taken to the zoo by my uncle last week.

    A. My unle was taken me to the zoo last week

   B. My uncle took me to the zoo last week.

   C. My uncle took I to the zoo last week.

   D. My uncle was take to the zoo last week.

   65. She started to work in this factory 10 years ago

A. She has started to  work in this factory 10 years ago.

B. She has started to work in this factory for 10 years ago.

C. She has worked in this factory for 10 years ago.

D. She has worked in this factoryfor 10 years.

66. It’s a pity she can’t go with us to the cinema.

 A. I wish she could go with us to the cinema.

 B. I wishes she could go with us to the cinema.

 C. I wish she can go with us to the cinema.

 D. I wish she couldn’t go with us to the cinema.

67. Noone has told us about the changes.

A. We were told about the changes.

B. We were tell about the changes.

C. We weren’t tell about the changes.

D. We weren’t told about the changes.

68. It took him 2 hours to get to the stadium.

A. He spend 2 hours to get to the stadium.

B. He spent 2 hours to get to the stadium.

C. He spent 2 hours getting to the stadium.

D. He spend 2 hours getting to the stadium.

69. She spends 20 minutes listening to music every morning.

A. It takes she 20 minutes listening to music every morning.

B. It takes her 20 minutes to listen to music every morning.

C. It takes her 20 minutes to listening to music every morning.

D. It takes her 20 minutes listening to music every morning.

70. Mai studied hard, so she passed the exam.

A. Because she passed the exam, so Mai studied hard.

B. Mai studied hard because she passed the exam.

C. Because Mai studied hard, she passed the exam.

D. Mai passed the exam, so she studied hard.

71. People speak English all over the world.   

A. English is spoken all over the world.

B. English was spoken all over the world.

C. English has been spoken all over the world.

D. English is spoke all over the world.

72. Did you do your test perfectly?

A. Did your test do perfectly?

B. Were you do your test perfectly?

C. Was your test done perfectly?

D. Was your test did perfedctly?

73. John smoked a lot two years ago, but now he doesn’t smoke any more.

A. John used to smoke a lot 2 years ago.

B. John used to smoking a lot 2 years ago.

C. John is used to smoke a lot 2 years ago.

D. John is used to smoking a lot 2 years ago.

         74. I last met him 2 years ago. (Rewite the sentence with “ I haven’t....)

         A. I haven’t met him 2 years ago.

         B. I haven’t met him for 2 years.

         C. I haven’t met him since 2 years.

         D. I haven’t met him since 2 years ago.

   76. He would like to become a doctor when he grows up.

(Rewrite the sentence with “He wishes .....”)

77.   Nobody has used this room for a long time (Change the sentence into the passive)

78.   We have waited for him since 2 p.m ( Rewrite the sentence with “ We began ....”)

79.   I last saw him when  I was a student.  (Rewrite the sentence with “ I haven’t ......”)

1
26 tháng 11 2021

64. I was taken to the zoo by my uncle last week.

    A. My unle was taken me to the zoo last week

   B. My uncle took me to the zoo last week.

   C. My uncle took I to the zoo last week.

   D. My uncle was take to the zoo last week.

   65. She started to work in this factory 10 years ago

A. She has started to  work in this factory 10 years ago.

B. She has started to work in this factory for 10 years ago.

C. She has worked in this factory for 10 years ago.

D. She has worked in this factoryfor 10 years.

66. It’s a pity she can’t go with us to the cinema.

 A. I wish she could go with us to the cinema.

 B. I wishes she could go with us to the cinema.

 C. I wish she can go with us to the cinema.

 D. I wish she couldn’t go with us to the cinema.

67. Noone has told us about the changes.

A. We were told about the changes.

B. We were tell about the changes.

C. We weren’t tell about the changes.

D. We weren’t told about the changes.

68. It took him 2 hours to get to the stadium.

A. He spend 2 hours to get to the stadium.

B. He spent 2 hours to get to the stadium.

C. He spent 2 hours getting to the stadium.

D. He spend 2 hours getting to the stadium.

69. She spends 20 minutes listening to music every morning.

A. It takes she 20 minutes listening to music every morning.

B. It takes her 20 minutes to listen to music every morning.

C. It takes her 20 minutes to listening to music every morning.

D. It takes her 20 minutes listening to music every morning.

70. Mai studied hard, so she passed the exam.

A. Because she passed the exam, so Mai studied hard.

B. Mai studied hard because she passed the exam.

C. Because Mai studied hard, she passed the exam.

D. Mai passed the exam, so she studied hard.

71. People speak English all over the world.   

A. English is spoken all over the world.

B. English was spoken all over the world.

C. English has been spoken all over the world.

D. English is spoke all over the world.

72. Did you do your test perfectly?

A. Did your test do perfectly?

B. Were you do your test perfectly?

C. Was your test done perfectly?

D. Was your test did perfedctly?

73. John smoked a lot two years ago, but now he doesn’t smoke any more.

A. John used to smoke a lot 2 years ago.

B. John used to smoking a lot 2 years ago.

C. John is used to smoke a lot 2 years ago.

D. John is used to smoking a lot 2 years ago.

         74. I last met him 2 years ago. (Rewite the sentence with “ I haven’t....)

         A. I haven’t met him 2 years ago.

         B. I haven’t met him for 2 years.

         C. I haven’t met him since 2 years.

         D. I haven’t met him since 2 years ago.

   76. He would like to become a doctor when he grows up.

(Rewrite the sentence with “He wishes .....”)

He wishes he would become a doctor when he grows up

77.   Nobody has used this room for a long time (Change the sentence into the passive)

This room hasn't been used for a long time

78.   We have waited for him since 2 p.m ( Rewrite the sentence with “ We began ....”)

We began waiting for him at 2 pm

79.   I last saw him when  I was a student.  (Rewrite the sentence with “ I haven’t ......”)

I haven't seen him since I was a student

HELP ME! MAI MK PHẢI NỘP R supply the correct verb form 1. ...she often( listen)... to music at night? 2. he( not give)...a nice gift to his girl friend last week 3. ...he often( watch)... tv after dinner? 4. I (not see)... my close friends since 2005 6. I( not meet)... Nam's father at the post office last night? 7. ...Nga( write)... a letter last night ? 8. my sister often( finish)... her homework before meals 9. they(not see)... their old friends last time 10. he( not see)...his...
Đọc tiếp

HELP ME!khocroi MAI MK PHẢI NỘP Rgianroi

supply the correct verb form

1. ...she often( listen)... to music at night?

2. he( not give)...a nice gift to his girl friend last week

3. ...he often( watch)... tv after dinner?

4. I (not see)... my close friends since 2005

6. I( not meet)... Nam's father at the post office last night?

7. ...Nga( write)... a letter last night ?

8. my sister often( finish)... her homework before meals

9. they(not see)... their old friends last time

10. he( not see)...his close friends since 2005

11. nga(do)...her homework now

12. they( not meet)... their friends at the movie theater last night

13. ...your family( visit)... nha trang next week?

14. while I (do)... my homework, the light(go)...out

15. I( not meet)... my old friends for 3 years

16. Ngan always(go)... to school on time

17. our teachers ( explain)... the lessons now

18. ...you(meet)...Mai's father at the post office yesterday? yes, i did.

19. ...he often( do)... his homework after dinner? Yes, he does

20. while (do)... my homework, the light(turn)... of

21. I (not/ see )... Lan for 4 moths

22. Mai(buy)... a dictionnary tomorrow

3
14 tháng 10 2017

supply the correct verb form

1. .DOES..she often( listen)..LISTEN. to music at night?

2. he( not give).DIDN'T GIVE..a nice gift to his girl friend last week

3. .DOES..he often( watch).WATCH.. tv after dinner?

4. I (not see)..HAVEN'T SEEN. my close friends since 2005

6. I( not meet)..DIDN'T MEET. Nam's father at the post office last night?

7. DID..Nga( write)..WRITE. a letter last night ?

8. my sister often( finish).FINISHES.. her homework before meals

9. they(not see)..DIDN'T SEE. their old friends last time

10. he( not see)...his close friends since 2005 HAVEN'T SEEN

11. nga(do)...her homework now

IS DOING

12. they( not meet)... their friends at the movie theater last night

DIDN'T MEET

13. ...your family( visit)... nha trang next week?

WILL ... VISIT

14. while I (do)... my homework, the light(go)...out

WAS DOING / WENT

15. I( not meet)... my old friends for 3 years

HAVEN'T MET

16. Ngan always(go)... to school on time

GOES

17. our teachers ( explain)... the lessons now

IS EXPLAINING

18. ...you(meet)...Mai's father at the post office yesterday? yes, i did.

DID YOU MEET

19. ...he often( do)... his homework after dinner? Yes, he does

DOES HE OFTEN DO

20. while (do)... my homework, the light(turn)... of

WAS DOING / WENT

21. I (not/ see )... Lan for 4 moths

HAVEN'T SEEN

22. Mai(buy)... a dictionnary tomorrow

IS GOING TO BUY

14 tháng 10 2017

supply the correct verb form

1. .Does.she often( listen)..listen. to music at night?

2. he( not give)..didn't give.a nice gift to his girl friend last week

3. .Does..he often( watch)..watch. tv after dinner?

4. I (not see)..haven't seen. my close friends since 2005

6. I( not meet).didn't met.. Nam's father at the post office last night

7. .Did..Nga( write)..write. a letter last night ?

8. my sister often( finish)..finishes. her homework before meals

9. they(not see)..didn't see. their old friends last time

10. he( not see).haven't seen.his close friends since 2005

11. nga(do)..is doing .her homework now

12. they( not meet).didn't meet.. their friends at the movie theater last night

13. .Will..your family( visit).visit.. nha trang next week?

14. while I (do).was doing.. my homework, the light(go).went..out

15. I( not meet)..haven't met. my old friends for 3 years

16. Ngan always(go).goes.. to school on time

17. our teachers ( explain)..are explaing. the lessons now

18. .Did..you(meet).meet..Mai's father at the post office yesterday? yes, i did.

19. ..Does.he often( do).do.. his homework after dinner? Yes, he does

20. while I (do).was doing.. my homework, the light(turn).turned.. of

21. I (not/ see ).haven't seen.. Lan for 4 moths

22. Mai(buy).will buy.. a dictionnary tomorrow

28 tháng 11 2021

1.reads

2.haven't had

3.watched

4.will come

28 tháng 11 2021

1 . reads

2 . haven't had

3 . watched

4 . will come

22 tháng 9 2021

1 learns

2 have never seen

3 plau

4 takes

5 plays

6 isn't

7 don't go

8 is

EX3. Chia các động từ trong ngoặc ở thì quá khứ đơn. 1. Last week, my mother (take) _____________ me to the zoo. 2. When we (arrive) _____________ at the party, there (not be) _____________ many people there. 3. My mother (say) _____________ that she (buy) _____________ me a new dress. 4. Last summer, my father (teach) _____________ me to drive. 5. I (start) _____________ doing charity when I (be) _____________ a first year student. 6. Many rich people (donate) _____________...
Đọc tiếp

EX3. Chia các động từ trong ngoặc ở thì quá khứ đơn.

1. Last week, my mother (take) _____________ me to the zoo.

2. When we (arrive) _____________ at the party, there (not be) _____________ many people there.

3. My mother (say) _____________ that she (buy) _____________ me a new dress.

4. Last summer, my father (teach) _____________ me to drive.

5. I (start) _____________ doing charity when I (be) _____________ a first year student.

6. Many rich people (donate) _____________ money for this volunteer program.

7. My friend (ring) _____________ me yesterday and (invite) _____________ me to his party.

8. What (you/ watch) _____________ on TV last night?

9. When my father (be) _____________ young, he (use to) _____________ be the most handsome boy in the village.

10. _____________ (you/ go) to see the concert yesterday?

11. My performance (not be) _____________ really good. I (not feel) _____________ happy about it.

12. Jim (spend) _____________ the whole day taking after his brother.

13. I (write) _____________ a letter to my foreign friend but he (not write) _____________ back.

14. _____________ (they/ be) students of our school?

15. Yesterday, I (see) _____________ Jim at a bookstore.

Giúp mình nha

1
31 tháng 10 2020

EX3. Chia các động từ trong ngoặc ở thì quá khứ đơn.

1. Last week, my mother (take) took me to the zoo.

2. When we (arrive) arrived at the party, there (not be) weren't many people there.

3. My mother (say) said that she (buy) bought me a new dress.

4. Last summer, my father (teach) taught me to drive.

5. I (start) started doing charity when I (be) was a first year student.

6. Many rich people (donate) donated money for this volunteer program.

7. My friend (ring) rang me yesterday and (invite) invited me to his party.

8. What (you/ watch) did you watch on TV last night?

9. When my father (be) was young, he (use to) used to be the most handsome boy in the village.

10. Did you go (you/ go) to see the concert yesterday?

11. My performance (not be) wasn't really good. I (not feel) didn't feel happy about it.

12. Jim (spend) spent the whole day taking after his brother.

13. I (write) wrote a letter to my foreign friend but he (not write) didn't write back.

14. Were they (they/ be) students of our school?

15. Yesterday, I (see) saw Jim at a bookstore.

31 tháng 10 2020

cảm ơn nha🙆🏻‍♀️❤️

I. Supply the correct form or tense of the verbs in the parentheses 1. Where is your mother? - She is in the kitchen. She ...........(cook) the dinner. 2. Your brother often ...........(go) to school by bus last year? 3. He often played football when he (be) ...........young. 4. Trung is learning to play the guitar. He ( have ) ...........guitar lessons twice a week. 5. Look! The plane (fly) ........... toward to the airport. It (land)............ 6. Take these medicines and you ( feel )...
Đọc tiếp

I. Supply the correct form or tense of the verbs in the parentheses

1. Where is your mother? - She is in the kitchen. She ...........(cook) the dinner.

2. Your brother often ...........(go) to school by bus last year?

3. He often played football when he (be) ...........young.

4. Trung is learning to play the guitar. He ( have ) ...........guitar lessons twice a week.

5. Look! The plane (fly) ........... toward to the airport. It (land)............

6. Take these medicines and you ( feel ) ........... better then, Ha.

7. I ...........(have) a birthday party tomorrow evening. Would you like ...........(come)?

8. ........... he........... (like) milk or tea?

9. Where is Nam? - He( watch)........... TV in his room at the moment.

10. I often go to school by bicycle but today I am ...........(go) to school by bus.

11. Me best friend (write)........... me a letter several time.

12. If it (be) ........... nice tomorrow. We (plant)........... some young trees.

13. - ........... you ever (see) ........... a real robot at work?

- No, never.

14. Do you think there (be) ........... a city underwater?

15. I (never, see)...........such a big flower.

16. He (never meet) ...........her before.

1
7 tháng 7 2017

I. Supply the correct form or tense of the verbs in the parentheses

1. Where is your mother? - She is in the kitchen. She ........IS COOKING..(cook) the dinner.

2. DID Your brother often ........GO...(go) to school by bus last year?

3. He often played football when he (be) .......WAS...young.

4. Trung is learning to play the guitar. He ( have ) .......HAS...guitar lessons twice a week.

5. Look! The plane (fly) ....IS FLYING....... toward to the airport. It (land).....IS GOING TO LAND.......

6. Take these medicines and you ( feel ) .....WILL FEEL...... better then, Ha.

7. I ......WILL HAVE.....(have) a birthday party tomorrow evening. Would you like ...TO COME........(come)?

8. .......DOES... he......LIKE..... (like) milk or tea?

9. Where is Nam? - He( watch)........IS WATCHING... TV in his room at the moment.

10. I often go to school by bicycle but today I am ........AM GOING..(go) to school by bus.

11. Me best friend (write)......HAS WRITTEN.... me a letter several time.

12. If it (be) ......IS.... nice tomorrow. We (plant)......WILL PLANT.... some young trees.

13. - ........HAVE... you ever (see) ......SEEN.... a real robot at work?

- No, never.

14. Do you think there (be) .....IS..... a city underwater?

15. I (never, see).......HAVE NEVER SEEN....such a big flower.

16. He (never meet) ........HAS NEVER MET...her before.