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Đáp án D
Giải thích: never…before: chưa từng…trước đây là trạng từ của thời hiện tại hoàn thành
Dịch: Chúng tôi chưa từng xem thí nghiệm vật lý này trước đây.
1. It is two years since she left university.
2. Laurence last saw her sister when she left for Japan.
3. The last time Lucky wore that dress was at Barbara's wedding
4. My mother has worked at this school for 25 years.
5. This is the first time I have been to this entertainment park.
6. The last time I heard from him was in August.
8. I have not played football since 1970.
9. We last saw Tom when he moved to Bristol.
10. Bob has not visited Vietnam before.
Mk tưởng câu 1 phải là "It has been two years since she left university" chứ nhỉ 
Rewrite the second sentence in such a way that it has the same meaning as the one before it:
1, I have never read such a romatic story
This is the first time I have read such a romatic story
2, We started cooking for the party four hours ago
We have started cooking for the party for four hours
3, How long is it since they bought the house ?
When did they buy the house
4, She hasn't been to the hairdresser for three months
It's three months since she last went to the hairdresser
5, I've never met such as famous person before
It's the first time I've met such as famous person
6, They last visited me five years ago
They haven't visited me for five years
1, I have never read such a romatic story
-> This is the first time I have ever read such a romatic story
2, We started cooking for the party four hours ago
-> We have cooked for the party for four hours
3, How long is it since they bought the house ?
-> When did they buy the house ?
4, She hasn't been to the hairdresser for three months
-> It's three months since she last went to the hairdresser.5, I've never met such as famous person before
-> It's the first time I've ever met such as famous person
6, They last visited me five years ago
-> They haven't visited me for five years
Đáp án: B
Giải thích: Câu chia ở hiện tại hoàn thành “have/ has + pII”
Dịch: Tôi chưa từng đến thác nước nào đẹp hơn cái này
1. I had bought this pen before I went to bed last night
=> This pen had been bought before I went to bed last night.
2. Nina had washed the dishes
=> The dishes had been washed by Nina.
3. I had written a report
=> A report had been written.
4. Sam had done his exercise by noon
=> Sam's exercise had been done by noon.
5. They had not finished the report before they had a test
=> The report hadn't been finished before they had a test.
6. We had seen this movie before Nina called
=> This movie had been seen before Nina called.
7. After I had cleaned the house, I went to school
=> After the house had been cleaned, I went to school.
8. After Mark had washed his clothes, he studied
=> After Mark's clothes had been washed, he studied.
9. Vicky had ironed the clothes by noon
=> Vicky's clothes had been ironed by noon.
10. I hadn't brushed my teeth before I went to bed last night
=> My teeth hadn't been brushed before I went to bed last night.
1. I was sure that I _______ the woman before.
a) seen b) had seen c) have seen d) has see
2. Tim wanted to know what _______ to his backpack.
a) have happened b) happened c) had happened d) happens
3. Marcia ______ by the time we got there.
a) left b) leaves c) have left d) had left
4. I realized that I ________ the wrong book from the library.
a) had taken b) took c) have taken d) take
5. Melissa ate the cake that I ______.
a) baked b) have bake c) bake d) had baked
6. The teacher asked why I _______ class early.
a) have left b) left c) had left d) leave
7. What did Andrew say that he __________ with my Cd?
a) had done b) did c) have done d) has done
8. At the party Susan ________ some cake.
a) have ate b) have eaten c) has ate d) has eaten
9. The teacher corrected the composition I ____.
a) have wrote b) have written c) had written d) has written
10. The last time I was there it _________ a very good restaurant.
a) had been b) have been c) been d) be
Final del formulario
11. Principio del formulario1. 1.1
Sam washed the car after he ______it with gas.
a) had filled b) have filles c) fills d) filled
12. Frank left the table after he _______ eating.
a) finishes b) have finished c)finish d)had finished
13. By the time my wife came home, I ______ the laundry
a) do b) had done c) did d) have done
14. I went to work after I _______ dog.
a) had walked b) walks c) have walked d) walks
15. Susan was late. By the time she got to school the class _______ already.
a) have started b) starts c) was starting d)had started
16. We watched TV after our daughter _______ to bed.
a) had gone b) go c) have went d) goes
17. We _____ that car for ten years before we sold it.
a) have b) did have c) had d) had had
18. By the time Maria finished her report, she _______ working on the computer for over three hours.
a) be b) has c) had been d) have been
19. She ______ Victoria once in 1993 before she moved there in 1996.
a) visit b) have visited c) had visited d) visits
20. Ming _____ as a carpenter before he was laid off.
a) works b) have worked c) work d) had worked
Đáp án: D
Giải thích: never…before: chưa từng…trước đây là trạng từ của thời hiện tại hoàn thành
Dịch: Chúng tôi chưa từng xem thí nghiệm vật lý này trước đây