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MỤC ĐÍCH CỦA BÀI NÀY LÀ BÀI TẬP CỦA 1 NGƯỜI BẠN CỦA MÌNH, MONG CÁC BẠN ĐỪNG LÀM, CAMON EXERCISE 1: Use the correct form of verbs in brackets. 1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters. 2. He sometimes (come) __________ to see his parents. 3. When I (come) __________, she (leave) __________for Dalat ten minutes ago. 4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing...
Đọc tiếp

MỤC ĐÍCH CỦA BÀI NÀY LÀ BÀI TẬP CỦA 1 NGƯỜI BẠN CỦA MÌNH, MONG CÁC BẠN ĐỪNG LÀM, CAMON

EXERCISE 1: Use the correct form of verbs in brackets.

1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters.

2. He sometimes (come) __________ to see his parents.

3. When I (come) __________, she (leave) __________for Dalat ten minutes ago.

4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing so.

5. We just (decide) __________ that we (undertake) ____________ the job.

6. He told me that he (take) __________ a trip to California the following week.

7. I knew that this road (be) __________ too narrow.

8. Right now I (attend) __________ class. Yesterday at this time I (attend) __________class.

9. Tomorrow I’m going to leave for home. When I (arrive) __________at the airport, Mary (wait) __________ for me.

10. Margaret was born in 1950. By last year, she (live) __________on this earth for 55 years .

11. The traffic was very heavy. By the time I (get) __________to Mary’s party, everyone already (arrive) __________

12. I will graduate in June. I (see) __________ you in July. By the time I (see) __________ you , I (graduate) __________.

13. I (visit) __________ my uncle’s home regularly when I (be) __________ a child.

14. That book (be) __________ on the table for weeks. You (not read) __________ it yet ?

15. David (wash) __________ his hands. He just (repair) __________ the TV set.

16. You (be) __________here before? Yes, I (spend) __________ my holidays here last year.

17. We never (meet) __________ him. We don’t know what he (look) __________ like.

18. The car (be) __________ ready for him by the time he (come) __________tomorrow.

19. On arriving at home I (find) __________that she just (leave) __________a few minutes before.

20. When we (arrive) __________ in London tonight, it probably (rain) __________.

21. It (rain) __________ hard. We can’t do anything until it (stop) __________

22. Last night we (watch) __________TV when the power (fail) __________.

23. That evening we (stay) __________up to talk about the town where he (live) __________for some years.

24. I (sit) __________down for a rest while the shoes (repair) __________.

25. Half way to the office Paul (turn) __________round and (go) __________back home because he (forget) __________to turn the gas off.

26. London (change) __________a lot since we first (come) __________ to live here.

27. While we (talk) __________on the phone the children (start) __________fighting and (break) __________a window

28. He used to talk to us for hours about all the interesting things he (do) __________ in his life.

29. You know she (stand) __________looking at that picture for the last twenty minutes.

30. I (spend) __________ a lot of time travelling since I (get) __________this new job.

31. When we (be) __________ at school we all (study) __________Latin.

32. When I (meet) __________ him , he (work) __________as a waiter for a year.

33. After he (finish) __________ breakfast he (sit) __________down to write some letters.

34. She (have) __________a hard life, but she’s always smiling.

35. I think Jim (be) __________ out of town.

ĐỪNG AI LÀM BÀI NÀY NHA! CÁI NÀY LÀ BÀI TẬP CỦA BẠN KUDO SHINICHI

4
4 tháng 8 2017

k cần làm bạn đang làm j?

7 tháng 8 2017

nhìn gà hóa quốc cứ tg mk cơ đấy

 Use the correct form of verbs in brackets.1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters.2. He sometimes (come) __________ to see his parents.3. When I (come) __________, she (leave) __________for Dalat ten minutes ago.4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing so.5. We just (decide) __________ that we (undertake) ____________ the job.6. He told me that he (take) __________ a trip to...
Đọc tiếp

 Use the correct form of verbs in brackets.

1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters.

2. He sometimes (come) __________ to see his parents.

3. When I (come) __________, she (leave) __________for Dalat ten minutes ago.

4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing so.

5. We just (decide) __________ that we (undertake) ____________ the job.

6. He told me that he (take) __________ a trip to California the following week.

7. I knew that this road (be) __________ too narrow.

8. Right now I (attend) __________ class. Yesterday at this time I (attend) __________class.

9. Tomorrow I'm going to leave for home. When I (arrive) __________at the airport, Mary (wait) __________ for me.

10. Margaret was born in 1950. By last year, she (live) __________on this earth for 55 years .

11. The traffic was very heavy. By the time I (get) __________to Mary's party, everyone already (arrive) __________

12. I will graduate in June. I (see) __________ you in July. By the time I (see) __________ you , I (graduate) __________.

13. I (visit) __________ my uncle's home regularly when I (be) __________ a child.

14. That book (be) __________ on the table for weeks. You (not read) __________ it yet ?

15. David (wash) __________ his hands. He just (repair) __________ the TV set.

16. You (be) __________here before? Yes, I (spend) __________ my holidays here last year.

17. We never (meet) __________ him. We don't know what he (look) __________ like.

18. The car (be) __________ ready for him by the time he (come) __________tomorrow.

19. On arriving at home I (find) __________that she just (leave) __________a few minutes before.

20. When we (arrive) __________ in London tonight, it probably (rain) __________.

1
13 tháng 8 2021

1.      In all the world, there (be) ____are______ only 14 mountains that (reach) ______reach____above 8,000 meters.

2.      He sometimes (come) _____comes_____ to see his parents.

3.      When I (come) ______came____, she (leave) _____had left_____for Dalat ten minutes ago.

4.      My grandfather never (fly) ____flies______ in an airplane, and he has no intention of ever doing so.

5.      We just (decide) ______have-decided____ that we (undertake)will undertake the job.

6.      He told me that he (take) _____would take_____ a trip to California the following week.

7.      I knew that this road (be) ____was______ too narrow.

8.      Right now I (attend) _____am attending_____ class. Yesterday at this time I (attend) ____was attending______class.

9.      Tomorrow I’m going to leave for home. When I (arrive) _arrive_________at the airport, Mary (wait)will be waiting  for me.

10. Margaret was born in 1950. By the year 2005, she (live) __had lived________on this earth for 55 years.

11. The traffic was very heavy. By the time I (get) ______got____to Mary’s party, everyone already (arrive) _____had already arrived_____

12. I will graduate in June. I (see)will see you in July. By the time I (see) ____see______ you, I (graduate) _____will have graduated_____.

13. I (visit) ______had visited____ my uncle’s home many times when I (be) ___was_______ a child.

14. That book (lie) _______has lain___ on the table for week. You (not read) ____haven't - read______ it yet?

15. David (wash) ____was washing______ his hands. He just (repair) ______has just repaired____ the TV set.

16. You (be) _____have you been_____here before? Yes, I (spend) ___spent_______ my holidays here last year.

17. We never (meet) ____have never met______ him. We don’t know what he (look) ____looks______ like.

18. The car (be) ____will have been______ ready for him by the time he (come) _____comes_____tomorrow.

19. On arriving at home I (find) __found________that she just (leave) ____had just left______a few minutes before.

20. When we (arrive) ____arrives______ in London tonight, it probably (rain) ____will-rain______.

B. Use the correct form of verbs in brackets.1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters.2. He sometimes (come) __________ to see his parents.3. When I (come) __________, she (leave) __________for Dalat ten minutes ago.4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing so.5. We just (decide) __________ that we (undertake) the job.6. He told me that he (take) __________ a trip to California the...
Đọc tiếp

B. Use the correct form of verbs in brackets.

1. In all the world, there (be) __________ only 14 mountains that (reach) __________above 8,000 meters.

2. He sometimes (come) __________ to see his parents.

3. When I (come) __________, she (leave) __________for Dalat ten minutes ago.

4. My grandfather never (fly) __________ in an airplane, and he has no intention of ever doing so.

5. We just (decide) __________ that we (undertake) the job.

6. He told me that he (take) __________ a trip to California the following week.

7. I knew that this road (be) __________ too narrow.

8. Right now I (attend) __________ class. Yesterday at this time I (attend) __________class.

9. Tomorrow I’m going to leave for home. When I (arrive) __________at the airport, Mary (wait) for me.

10. Margaret was born in 1950. By the year 2005, she (live) __________on this earth for 55 years .

11. The traffic was very heavy. By the time I (get) __________to Mary’s party, everyone already (arrive) __________

12. I will graduate in June. I (see) you in July. By the time I (see) __________ you , I (graduate) __________.

13. I (visit) __________ my uncle’s home many times when I (be) __________ a child.

14. That book (lie) __________ on the table for week. You (not read) __________ it yet ?

15. David (wash) __________ his hands. He just (repair) __________ the TV set.

16. You (be) __________here before? Yes, I (spend) __________ my holidays here last year.

17. We never (meet) __________ him. We don’t know what he (look) __________ like.

18. The car (be) __________ ready for him by the time he (come) __________tomorrow.

19. On arriving at home I (find) __________that she just (leave) __________a few minutes before.

20. When we (arrive) __________ in London tonight, it probably (rain) __________.

1
10 tháng 8 2021

1. In all the world, there (be) _____are_____ only 14 mountains that (reach) _____reach_____above 8,000 meters.

2. He sometimes (come) _____comes_____ to see his parents.

3. When I (come) ____came______, she (leave) _____had left_____for Dalat ten minutes ago.

4. My grandfather never (fly) ____flies______ in an airplane, and he has no intention of ever doing so.

5. We just (decide) ____have just decided______ that we (undertake) the job.

6. He told me that he (take) ___would take_______ a trip to California the following week.

7. I knew that this road (be) ____was______ too narrow.

8. Right now I (attend) _____am attending_____ class. Yesterday at this time I (attend) ______was attending____class.

9. Tomorrow I’m going to leave for home. When I (arrive) ___arrive_______at the airport, Mary (wait)will be waiting for me.

10. Margaret was born in 1950. By the year 2005, she (live) ___had lived_______on this earth for 55 years .

11. The traffic was very heavy. By the time I (get) ____got______to Mary’s party, everyone already (arrive) __had -arrived________

12. I will graduate in June. I (see)will see you in July. By the time I (see) _see_________ you , I (graduate) _____will have graduated_____.

13. I (visit) _______visited___ my uncle’s home many times when I (be) ______was____ a child.

14. That book (lie) ______has lain____ on the table for week. You (not read) ________Haven't you read__ it yet ?

15. David (wash) _____is washing_____ his hands. He just (repair) ____has-repaired______ the TV set.

16. You (be) ______have you been____here before? Yes, I (spend) ____spent______ my holidays here last year.

17. We never (meet) ______have - met____ him. We don’t know what he (look) _____looks_____ like.

18. The car (be) _____will have been_____ ready for him by the time he (come) _______comes___tomorrow.

19. On arriving at home I (find) _______found___that she just (leave) ______had just left____a few minutes before.

20. When we (arrive) _______arrive___ in London tonight, it probably (rain)will probably be raining __________.

10 tháng 8 2021

yeww

 

Use the correct form of verbs in brackets.1. In all the world, there (be) are only 14 mountains that (reach) reach above 8,000 meters.2. He sometimes (come) comes to see his parents.3. When I (come) came she (leave) had left for Dalat ten minutes ago.4. My grandfather never (fly) has never flown in an airplane, and he has no intention of ever doing so.5. We just (decide) have just decided that we (undertake) would undertake the job.6. He told me that he (take) would take a trip to California...
Đọc tiếp

Use the correct form of verbs in brackets.

1. In all the world, there (be) are only 14 mountains that (reach) reach above 8,000 meters.

2. He sometimes (come) comes to see his parents.

3. When I (come) came she (leave) had left for Dalat ten minutes ago.

4. My grandfather never (fly) has never flown in an airplane, and he has no intention of ever doing so.

5. We just (decide) have just decided that we (undertake) would undertake the job.

6. He told me that he (take) would take a trip to California the following week.

 7. I knew that this road (be) was too narrow.

8. Right now I (attend) am attending class. Yesterday at this time I (attend) was attending class.

9. Tomorrow I'm going to leave for home. When I (arrive) arrive at the airport, Mary (wait) will be waiting for me.

10. Margaret was born in 1950. By last year, she (live) had lived on this earth for 55 years .

11. The traffic was very heavy. By the time I (get) got to Mary's party, everyone already (arrive) had already arrived

12. I will graduate in June. I (see) will see you in July. By the time I (see) see you , I (graduate) will have graduated

 13. I (visit) visited my uncle's home regularly when I (be) was a child.

14. That book (be) has been on the table for weeks. You (not read) Haven't you read it yet ?

15. David (wash) is washing his hands. He just (repair) has just repaired the TV set.

16. You (be) Have you been here before? Yes, I (spend) spent my holidays here last year.

17. We never (meet) have never met him. We don't know what he (look) looks like.

18. The car (be) will have been ready for him by the time he (come) comes tomorrow.

19. On arriving at home I (find) found that she just (leave) had just left a few minutes before.

20. When we (arrive) arrive in London tonight, it will probably (rain) be raining

21. It (rain) is raining hard. We can't do anything until it (stop) stops

22. Last night we (watch) were watching TV when the power (fail) failed.

23. That evening we (stay) stayed up to talk about the town where he (live) had lived for some years.

24. I (sit) sat down for a rest while the shoes (repair) were being repaired.

25. Half way to the office Paul (turn) turned round and (go) went back home because he (forget) had forgotten to turn the gas off.

26. London (change) has changed a lot since we first (come) came to live here.

27. While we (talk) were talking on the phone the children (start) started fighting and (break) broke a window

28. He used to talk to us for hours about all the interesting things he (do) had done in his life.

29. You know she (stand) has been standing looking at that picture for the last twenty minutes.

30. I (spend) have spent a lot of time travelling since I (get) got this new job.

31. When we (be) were at school we all (study) studied Latin.

32. When I (meet) met  him , he (work) was working as a waiter for a year.

33. After he (finish) had finished breakfast he (sit) sat down to write some letters.

34. She (have) has a hard life, but she's always smiling.

35. I think Jim (be) has been out of town.

 

 

0
Exercise 02: Use the correct form of verbs in brackets.1. How long __________ you (study) __________ English? *Câu trả lời của bạn:2. Now they (play) ____________________ happily in the school yard. *Câu trả lời của bạn:3. Mr. David (just buy) ____________________ a new house.Câu trả lời của bạn:4. They (build) ____________________ a new hospital in my neighborhood next month.Câu trả lời của bạn:5. Alexander Graham Bell (invent) _____________ the telephone many...
Đọc tiếp

Exercise 02: Use the correct form of verbs in brackets.

1. How long __________ you (study) __________ English? *

Câu trả lời của bạn:

2. Now they (play) ____________________ happily in the school yard. *

Câu trả lời của bạn:

3. Mr. David (just buy) ____________________ a new house.

Câu trả lời của bạn:

4. They (build) ____________________ a new hospital in my neighborhood next month.

Câu trả lời của bạn:

5. Alexander Graham Bell (invent) _____________ the telephone many years ago.

Câu trả lời của bạn:

6. Lan often (do) __________ her homework carefully. *

Câu trả lời của bạn:

7. I (not finish) _______________________ reading the novel you lent me yet.

Câu trả lời của bạn:

8. Julia (write) ________________________ an email to her boy friend at 7 o'clock tomorrow. *

Câu trả lời của bạn:

9. In summer, the Sun usually (shine) __________________ brightly. *

Câu trả lời của bạn:

10. Mai and her friends (walk) ____________________ to school now. *

Câu trả lời của bạn:

2
29 tháng 6 2021

1 have you studied

2 are playing

3 has just bought

4 will built

5 invented

6 does

7 haven't finished

8 will be writing

9 shines

10 are walking

29 tháng 6 2021

1 have you studied

2 are playing

3 has just bought

4 will built

5 invented

6 does

7 haven't finished

8 will be writing

9 shines

10 are walking

Exercise 2: Give the correct form of the verbs in brackets.1. The news about Mr Hogan (be) ___________surprising.2. Fifty minutes (be)___________the maximum length of the time allowed for the exam.3. Many people in the world (not have) ___________enough food to eat.4. The poor (need)___________ help from the community.5. Listening to loud music at rock concerts  (cause)_______ hearing loss in some teenagers these days.6. There (be) ___________a lot of sheep in the field.7. Ten miles (be)...
Đọc tiếp

Exercise 2: Give the correct form of the verbs in brackets.

1. The news about Mr Hogan (be) ___________surprising.

2. Fifty minutes (be)___________the maximum length of the time allowed for the exam.

3. Many people in the world (not have) ___________enough food to eat.

4. The poor (need)___________ help from the community.

5. Listening to loud music at rock concerts  (cause)_______ hearing loss in some teenagers these days.

6. There (be) ___________a lot of sheep in the field.

7. Ten miles (be) ___________ too far to walk.

8. Not only John but also his friends (want) ___________ to buy this race horse.

9. A number of students (recently participate) ___________ in intensive language programs abroad.

10. Sarah, along with 20 students, (plan) ___________a party now.

11. The number of students who (withdraw) ___________from class since the term began

      (be) ___________quite high.

12. There (be) at least one window in every room.

13. A lot of students in my class (speak) ___________ and (undrstand) ___________ Spanish.

14. The trousers Lan’s bought (not, go) ___________ best with her shirt.

15. The information she gave me (be not) ___________valuable.

16. The number of days in a week (be) ___________seven.

17. Either you or he (have) ___________to do the task.

18. Two years without a job (be) ___________too long to be.

19. Every girl and boy (be) ___________required to have certain immunizations before enrolling in public school.

20. Neither of John’s parents (be)___________ English.

1
5 tháng 11 2021

1 is

2 is

3 don't have

4 need

5 causes

6 are

7 is

8 want

9 have recently participated

10 is planning

11 withdraw - to be

12 is

13 speak - understand

14 don't go

15 wasn't

16 is

17 has

18 is

19 is

20 is

23 tháng 3 2023
Contractions with I, you, he, she, it, we, and they

’m = am (I’m)

’re = are (you’re, we’re, they’re)

’s = is and has (he’s, she’s, it’s)

’ve = have (’ve, you’ve, we’ve, they’ve)

’ll = will (I’ll, you’ll, he’ll, she’ll, it’ll, we’ll, they’ll)

’d = had and would (I’d, you’d, he’d, she’d, it’d, we’d, they’d)

30 tháng 11 2021

1 was

2 stood

3 noticed

4 ran

5 picked him up

V/ Write the correct form of the verbs in brackets:1. Our house (destroy) ………………in the storm last night. It (repair) ………………… at the moment.2. There (be) ………………no guests at all since I ……………….(leave)3. The vase ………………………  (break)  when it (move) …….…………… to the other room.4. When Jennifer ……………… (win) the lottery, she ……………………. any kind of contest before. (not, enter)5. Two robbers who (put) ………………in prison yesterday (just/ escape) …………….1.      I …………………. this film twice.  (see)2.      The...
Đọc tiếp

V/ Write the correct form of the verbs in brackets:

1. Our house (destroy) ………………in the storm last night. It (repair) ………………… at the moment.

2. There (be) ………………no guests at all since I ……………….(leave)

3. The vase ………………………  (break)  when it (move) …….…………… to the other room.

4. When Jennifer ……………… (win) the lottery, she ……………………. any kind of contest before. (not, enter)

5. Two robbers who (put) ………………in prison yesterday (just/ escape) …………….

1.      I …………………. this film twice.  (see)

2.      The train ………………….when we got to the station. (just, leave)

3.      It is raining now. It began raining two hours ago. So it …………………. for two hours. (rain)

4.      As soon as Martina (see) ……………..  the fire, she ………….the fire department. (telephone)

5.      After the race …………………., the celebration began. (end)

6.      At this time tomorrow, we …………………. our final exam. (take)

7.      Peter said he ………………….a test the following day. (have)

8.      I will tell Anna all the news when I ……………… her. (see)

3
13 tháng 11 2021

Htjfnjfjdkdkodlkd

13 tháng 11 2021

1. Our house (destroy) ……was destroyed…………in the storm last night. It (repair) ……is repairing…………… at the moment.

2. There (be) …… have been…………no guests at all since I ……left………….(leave)

3. The vase ………broke………………  (break)  when it (move) ……was being moved.…………… to the other room.

4. When Jennifer ……won………… (win) the lottery, she …hadn't entered…………………. any kind of contest before. (not, enter)

5. Two robbers who (put) ……put…………in prison escaped yesterday (just/ escape)

1.      I ………have seen…………. this film twice.  (see)

2.      The train …… had just left…………….when we got to the station. (just, leave)

3.      It is raining now. It began raining two hours ago. So it …… has been raining……………. for two hours. (rain)

4.      As soon as Martina (see) …saw…………..  the fire, she telephoned………….the fire department. (telephone)

5.      After the race …… had been won……………., the celebration began. (end)

6.      At this time tomorrow, we … will be taking ………………. our final exam. (take)

7.      Peter said he …would have……………….a test the following day. (have)

8.      I will tell Anna all the news when I ……see………… her. (see)

2. Read the texts. Check your answers in exercise 1. Were any of your guesses correct?(Đọc đoạn văn. Kiểm tra câu trả lời của bạn ở bài tập 1. Có dự đoán nào của bạn đúng không?)Inventions the world forgot1. TelhartnoniumThe Telharmonium was the world's first electronic musical instrument. It was designed by Thaddeus Cahill in 1897. Music from the instrument was broadcast to people’s homes using a telephone. Before the invention of the radio, people loved these...
Đọc tiếp

2. Read the texts. Check your answers in exercise 1. Were any of your guesses correct?

(Đọc đoạn văn. Kiểm tra câu trả lời của bạn ở bài tập 1. Có dự đoán nào của bạn đúng không?)

Inventions the world forgot

1. Telhartnonium

The Telharmonium was the world's first electronic musical instrument. It was designed by Thaddeus Cahill in 1897. Music from the instrument was broadcast to people’s homes using a telephone. Before the invention of the radio, people loved these first home concerts. After Cahill's death in 1934, his brother kept one of the three models, but in 1962 it was destroyed. No recordings of the music were kept, so the Telharmonium and its unique sound have disappeared forever.

2. The Writing Ball

Invented in 1865 by Rasmus Malling- Hansen from Denmark, the Writing Ball was a machine for typing onto paper. Its use of electricity made the movement faster. However, you could not see the paper as you were typing. Nevertheless, the Writing Ball was very successful. Since each model was made by hand, it was soon replaced by other cheaper machines produced in factories. A new keyboard with a different key arrangement appeared. The once-popular Writing Ball was forgotten.

3. The Antikythera Mechanism

In 1901, parts of an ancient machine were discovered on a ship near the Greek island of Antikythera. It had been made about 1,900 years earlier, in 2 BCE. For many years after its discovery, nobody understood exactly what the machine was for. In the 1970s, scientists found that this ancient computer had been designed to predict the movements of the sun, the moon and the planets. It did this using more than thirty hand-made metal wheels of different sizes. The remains of the Antikythera mechanism are now kept at the National Archaeological Museum in Athens, together with a number of reconstructions to demonstrate how it may have worked.

 

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11 tháng 9 2023

Phương pháp giải:

Tạm dịch: 

Phát minh bị thế giới bỏ quên

1. Telharmonium

Telharmonium là nhạc cụ điện tử đầu tiên trên thế giới. Nó được thiết kế bởi Thaddeus Cahill vào năm 1897. Âm nhạc từ nhạc cụ này được phát đến nhà của mọi người bằng điện thoại. Trước khi có sự phát minh của đài radio, mọi người yêu thích những buổi hòa nhạc tại nhà đầu tiên này. Sau cái chết của Cahill vào năm 1934, anh trai của ông vẫn giữ một trong ba mô hình, nhưng vào năm 1962, nó đã bị phá hủy. Không có bản ghi âm nhạc nào được lưu trữ, vì vậy Telharmonium và âm thanh độc đáo của nó đã biến mất vĩnh viễn.

2. Writing Ball

Được phát minh vào năm 1865 bởi Rasmus Malling-Hansen đến từ Đan Mạch, Bóng Bóng Viết là một cỗ máy dùng để đánh máy lên giấy. Việc sử dụng điện làm cho nó chuyển động nhanh hơn. Tuy nhiên, bạn không thể nhìn thấy giấy khi bạn đang đánh máy. Tuy nhiên, Bóng Viết đã rất thành công. Vì mỗi mô hình đều được làm bằng tay nên nó đã sớm bị thay thế bởi các loại máy khác rẻ hơn được sản xuất trong các nhà máy. Một bàn phím mới với cách sắp xếp phím khác đã xuất hiện. Bóng Viết đình đám một thời đã bị lãng quên.

3. Cơ chế Antikythera

Vào năm 1901, các bộ phận của một cỗ máy cổ đại được phát hiện trên một con tàu gần đảo Antikythera của Hy Lạp. Nó đã được tạo ra khoảng 1.900 năm trước đó, vào năm 2 TCN. Trong nhiều năm sau khi được phát hiện, không ai hiểu chính xác chiếc máy này dùng để làm gì. Vào những năm 1970, các nhà khoa học phát hiện ra rằng chiếc máy tính cổ đại này được thiết kế để dự đoán chuyển động của mặt trời, mặt trăng và các hành tinh. Nó đã làm được điều này bằng cách sử dụng hơn ba mươi bánh xe kim loại làm bằng tay với các kích cỡ khác nhau. Phần còn lại của cơ chế Antikythera hiện được lưu giữ tại Bảo tàng Khảo cổ học Quốc gia ở Athens, cùng với một số bản tái tạo để chứng minh nó có thể đã hoạt động như thế nào.

11 tháng 9 2023

 1. was … watched

 2. Were … rescued

 3. are improved

 4. was nearly killed

 5. is … employed

 6. are … sometimes held

 7. was … shown