This text appears to be an exercise sheet focused on verb tenses, likely in English language learning. Here are suggested completions for each sentence:

1. He has worked here for 20 years.
2. He started **working here 20 years ago**.
3. I have studied English for five years.
4. I began **studying English five years ago**.
5. We have worked in this company for some months.
6. We started **working in this company a few months ago**.
7. Lan has written **a diary for some weeks**.
8. Lan began **writing the diary**.
9. We last went to the cinema three months ago.
10. We haven’t **been to the cinema since then**.
11. I last met her three years ago.
12. I haven’t **met her since then**.
13. He last visited his grandmother six months ago.
14. He hasn’t **visited her since then**.
15. I like to cycle round the city park every morning.
16. I enjoy **cycling round the city park**.
17. I will not make the mistake again.
18. I promised **not to make the mistake again**.
19. Could you turn the radio down, please?
20. Would you mind **turning the radio down?**
21. Shall we get married? Yes, let’s.
22. They decided **to get married**.
23. Why don’t we go for a picnic next Sunday?
24. She suggested **going for a picnic next Sunday**.
25. Nam will bring the birthday cake to my birthday party.
26. Nam agreed **to bring the cake**.
27. I would like you to take me to the post office.
28. Would you mind **taking me to the post office?**
29. We like playing football with our friends at weekends.
30. We want **to play football**.
31. He doesn’t want to meet me.
32. He always avoids **meeting me**.

Feel free to ask for further details or clarifications!