I haven’t seen him for 8 days

27. I haven’t seen him for 8 days.
→ The last…………………………………………………
28. The last time we met each other was ten years ago.
→ We haven’t ………………………………………………………
29. It's 2 years since I last visited Ha Long bay.
→ I have not…………………………………………………
30. It's 2 months since he earned any money.
→ He has …………………………………………………