Đáp án.
1. was
2. taught - has graduated
3. doesn't watch
4. met
5. thanked
6. was
7. am
8. had been
9. has driven - known
10. Speak
11. were you doing - rang
12. had never seen
13. haven't seen
14. will leave - knows
15. was playing - arrived
16. will come - see
17. will come - Are you ready
18. will come
19. will you spend
20. bloom
21. haven't lived
22. will never forget - have just told
23. are preparing
24. has worked
25. worked
26. build - fly
27. have lose - Can
28. hasn't smoked
29. arrived - has just gone
30.been
31. have you received
32. joined - was
33. wrote
34.left - haven't heard
