1. They have just decided that they would undertake the job.

2. We went to the theatre last night.
3. He ussally writes in green ink.
4.She will be playing the piano at this time tomorrow.
5. We are doing an English exercise at the moment.
6. She has just come in and will see you in 5 minutes.
7. I will come as soon as my work is finished. 
8. Where did you go for your holiday last years?
9.I haven't left Paris since we went to Dieppe three years go.
10. My mother_is coming to stay with us next weekend.
11 We met only yesterday but we_have already decided_to get married.
12 I have never seen snow.
13. Violets_bloom in spring.
14. We haven't lived_ in England for the last two months.
15. I have lost my keys; I cannot remember where I last saw them.
Lười quá thông cảm

1. have just decided/ would undertake

2. went

3. writes

4. will be playing

5. are doing

6. has just come/ will see

7. will come

8. did you go

9. haven't left/ went

10. will come

11. met/ have already decided

12. have never seen

13. bloom

14. haven't lived

15. have lost/ saw

16. saw

17. go/ spend

18. will never forget/ have just told

19. are preparing

20. will be waiting/ arrives

21. will finish

22. have you made

23. will be watching

24. will meet/ finish

25. bought/ was