đáp án :

5. It's over a year since I last went to see them

I haven't seen them

6.It's more than ten years since I last played football

I haven't play football for ten years

1.She hasn't performed for ten years ago.

2.He spent nearly two hours doing the washing up.

3.It took him two hours to study for the test.

5.I last worked for him six months ago.

10.They spent two hours finishing their homework.

12,I haven't seen him since I was in high school.

11. I haven't seen her since 2007  -> it's...13 year since I.last saw her......

12.I haven't been to the dentist's for 2 years -> it's..2.year since the last time I went to the dentist........

13. It's last year since i last heard from her -> I have..heard.from her for 1 year......

14. It's 2 years since i saw her -> I haven't...seen her for 2 years.

15.Na and Mi last visited their parents in 1998 -> it's...22 year since the last time Na and Mi visited their parents...

16. She last visited her parents in 1998 -> it's..22 year since the last time she visited her mother......

17.The last time i saw him was ten years ago -> it's..ten years since the last time I saw.him...

18. They haven't phoned us for a month -> it is.a month since the last time they.phoned ours..........

19. They haven't seen my friend for 1 month  -> It is 1 month.since the last time they.saw my.friend........

20. John has not had his hair cut for over six months -. it is..over 6 months since the last time John cut his hair.........

21.Lan and Maryam have corresponded for 3 years -> it is 3 years .since the last time Lan and Maryam corresponded............

22. Lan hasn't written to Maryam gor 2 months -> Lan didn't..write to Maryam 2 months ago.......

1. This is the first time they have heard such a thing

2. This is the first time one has challenged his authority.

3. It is 2 years since she left university 

They have never heard such a thing before. => This is the firt time they have heard such a thing 

Noone has challeged his authority before. => This is the first time one has challenged his authority

She left university 2 years ago =>It is  2 years since she left university

my mother  was the most warm-hearted person I've ever known.=>I have never known such my warm - heated mother 

I haven't been able to see them for over a years.=>It is 

It stared to rain ai o'clock.=>It has

 lm nốt 2 câu cuối nhé

1.It is a good idea for me to do voluntary work

=> I ................should do voluntary work

2.It is unnecessary for us to book seats for the theatre in advance

=> We .............needn't book seats for the theatre in advance

3.my parents never let me forget to do my homework'

=> my parents always ............remind me to do my homework

4.They don't allow me to stay overnight at my friend's house

=>they don't let............me stay overnight at my friend's house  

5.he is interested in participating in social media 

=>he is keen ...on participating in social media

6.his mother fobides him to play computer games

=>his parents don't allow .........him to play computer games

7.It's obligatory for every employee to keep the company's information secret

=>every employee ..............has to keep the company's information secret

1. I should do voluntary work

2. We don't need to book seats for the theatre in advance.

3. They don't let stay overnight at my friend's house.

4. My parents always remind me to do my homework.

5. He is keen on participating in social media.

6. His parents don't allow him to play computer games.

7. Every employee must keep the company's information secret.

1. Đối với tôi, làm công việc tình nguyện là một ý kiến ​​hay

=> Tôi .............

2. Chúng ta không cần phải đặt chỗ trước cho rạp hát

=> Chúng tôi .............

3.Bố mẹ tôi không bao giờ để tôi quên làm bài tập về nhà'

=> bố mẹ tôi luôn ............

4. Họ không cho tôi qua đêm ở nhà bạn tôi

=> họ không cho............

5. anh ấy thích tham gia mạng xã hội

=> anh ấy rất quan tâm ...

6. mẹ anh ấy cấm anh ấy chơi game trên máy tính

=> bố mẹ anh ấy không cho phép .........

7. Mọi nhân viên bắt buộc phải giữ bí mật thông tin của công ty

=> mỗi nhân viên............

có tiếng việt thì dễ làm tiếng anh 

chứ mình không biết làm

3. I met her during my stay in Paris last summer. (while)

-> I met her while I was staying in Paris last summer. 

4. We haven't gone to the cinema for over a year. (It's)

-> It is over a year since we last went to the cinema.

5. Sam played tennis yesterday and it was his first game. (never)

-> Sam had never played tennis before yesterday.

6. How long is it since they went to Nairobi? (When).

-> When did they go to Nairobi?

7. Mac Kenzie wrote four best-sellers before he was twenty. (By the age)

-> By the age of twenty, Mac Kenzie had written four best-sellers.

8. She is still working on her homework. (stopped)

-> She hasn't stopped working on her homework.

9. Could you deliver the goods to my house? (delivered)

-> Could you have the goods delivered to my home?

10. In the middle of our dinner there was a knock at the door. (when)

-> When we were having dinner, there was a knock at the door.

3 While I was staying in Paris, I met her

4 It's over a year since we went to the cinema

5 Sam had never played tennis before yesterday

6 When did they go to Nairobi 

7 By the age of 20, Mac Kenzie had written for 4 best-sellers 

8 She hasn't stopped working on her homework

9 Could the goods be delivered to my house

10 When we were having dinner, there was a knock at the door