23.she has cooked for the party for 10 years

24. my sister has studyed english for 1 year

25.the brown began to live in london 20 years ago

26. scientist has fought against AIDS since 1980

27.this hospital has been using laser treatment for 5 years

28. she bagan working for this factory 8 years ago

29. she has been working as a book keeper for this company for 5 years

30.mr smith began teaching in this college in 1989

V

31.my parents don't let me play games on computer

32.it took him an hour to do his homework last night

33.my father let me drive his car

34.when the police arrived, the robber had run away

35.i advise that you should live alone

36.i suggest watching television for a change

37.i was having luch when you phoned me

38.she made her son clean his room

39.i last saw her in2001

40. the young man told the policeman to empty his pocket

41.i hate cheating in the exam

42.he invited me to go to the movies

43.the last time i came to the cinema was 2 months

44.he went on reading the newspaper although it was getting darker and darker

45.after reading the book, she decided that she didn't like it