EX16: Put in the present perfect of the verbs in brackets. 1. There ____ (be) a lot of changes in Vietnam since the 1990s. 2. There is no more cheese. I ____ (eat) it all, I'm afraid. 3. It'll soon get warm in here. I ____ (turn) the heating on. 4. The bill isn't right. They ____ (make) a mistake. 5. I just ____ (see) Andrew and he says he ____ (do) about half of the plan. 6. She ____ (not/have) any fun for a long time. 7. You ____ (not/do) your project yet, I suppose. 8. Don't you want to see this programme? It ____ (start). 9. My son ____ (study) English since he was a young man. 10. My brother ____ (not have) his car repaired since I left him. 11. This is the first time that I ever ____ (eat) this kind of food. 12. My friends ____ (drink) since it started to rain.