Put the verb in brackets into the past perfect
1. The pupils talked aboud the film they ( watch)
2.We never (see) such a beautiful beach before we went to nha trang
3. I did not have any money because i not ( go ) to the bank.
4. He was not allowed to get on the plane because he ( lose ) his passport
5. Tony knew tokyo so well because he ( visit ) the city several times
6. ........... linda (study) English before she went london?
7. She understood the film because she (read ) the book
8. Susan (not/be) to an opera before last week
9. They were not able to get a table at the restaurant because they (not book) in advance
10. ....... you ever (visit) vietnam before you trip in 2012?
Yes, i (go) there once before
11. I (use) that computer for four years before it broke down
12. By the time andy finished his studes,he (live) in london for over eight years
13. They did not want to sell their house because they (possess) it for more than 220 years
14. ......... she over ( see) a zebra before she visited the zoo last week?
15. I couldn't cut the grass because the lawn mower (break) a few days previously.