20. Is

21. are

22. are

23. am, are

24. is, am

25. at

26. in

27. at

28. at

29. in

30. isn't working

31. are doing

32. are you crying

33. is practising

34. isn't going

     is visiting

35. is repairing

36. E

37. A

38. D

39. B

40. C

41. G