21. He is a doctor and he works in a big hospital in London.
22. 7,5 hours.
23. He often plays golf and has a drink with his colleagues.
24. He has dinner at 7 p.m.
25. He often reads newspapers and watches TV.
Ex2:
26. Mr. Tuan = > Mr. Tuan's cows.
27. teenager = > teenagers
28. talking to = > talking about
29. country = > countries
30. Learn = > learning