21.have worked

22.Have/been

23.haven't done

24.have just seen/has aready done

25.have just deceided

26.has been

27.hasn't had

28.hasn't played

29.haven't had

30.goes

31.haven't seen

32.have just relized

33.have you known

34.Have you taken

35.Has she eaten

36.has lived

37.has lost

38.has/left/has left

39.have bought

40.has written

41.have finished

43.has bought

44.haven't planed

45.are you

46.has written

47.haven't seen

48.Are you being

49.hasn't started

50.Has he spoken

Chúc bạn học tốt ^_^!!!
(Nếu thấy hay hãy vote 5*,cảm ơn và bình chọn là câu trả lời hay nhất để mik có động lực giải tiếp các BT khác nhé!)

1, have worked

2, have..been

3, haven't...done

4, have just seen/have already done

5, have just decied

6, has been

7, hasn't had

8, hasn't played

9, haven't had

10,haven't seen

11,have just realized