6. I (collect) stamps when I was a child.

=> collected
7.I (not meet )them last night

=> didn't meet

8.Where you (go) 2 days ago?- I (go) to Hue City

=> did you go - went
9. 2 years ago, he (teach )at a village school

=> taught
10.Last Sunday, he (not go) to the English club.

=> didn't go
11.What you (do) yesterday morning?- I (write ) my essay

=> did you did  - wrote
12.I (finish) high school in 2002.

=> finished
13. You( go) out last night?

=> did go
14. You (visit) your grandparents yesterday? Yes, I (do)

=> visted - did
15.My mother (give) me a yellow cap.

=> gave
16. They (live) there 2 days ago

=> lived
17. When I (be) small, I often (go) swimming

=> were - went
18. Minh (not go) jogging yesterday; She (stay) at home and (do) aerobics

=> didn't go - stayed - did
19. It’s time you (leave) 

=> leaved
20. Quang (not play) sports yesterday.

=> didn't play
21. What you (eat) last night? – I (eat) fish

=> ate - ate
22.When you (meet) Sarah? –I (meet) her 2 years ago

=> met - met
23.You ( watch) TV last night?

=> watched
24. I would rather you (not come) late.

=> didn't come
25.I (see) her last year.

=> saw

6. I (collect) collected stamps when I was a child.

7. I (not meet ) have not met them last night

8. Where did you (go) go 2 days ago?- I (go) was to Hue City

9. 2 years ago, he (teach ) taught at a village school

10. Last Sunday, he (not go) didn't go to the English club.

11. What did you (do) do yesterday morning?- I (write ) wrote my essay

12. I (finish) finished high school in 2002.

13. Did you( go) go out last night?

14. Did you (visit) visit your grandparents yesterday? Yes, I (do) did

15. My mother (give) gave me a yellow cap.

16. They (live) have lived there 2 days ago

17. When I (be) were small, I often (go) went swimming

18. Minh (not go) didn't go jogging yesterday; She (stay) stayed at home and (do) did aerobics

19. It’s time you (leave) left

20. Quang (not play) doesn't play sports yesterday.

21. What did you (eat) eat last night? – I (eat) ate fish

22. When you (meet) meet Sarah? –I (meet) met her 2 years ago

23. You ( watch) watched TV last night?

24. I would rather you (not come) didn't come late.

25. I (see) saw her last year.