b

maintenance

information

d

d

41. going -> to go

42. getting -> to get

43. every -> each

44. is ringing -> rang

45. go -> goes

46. skipping -> are skipping

47. comes -> come

48. some -> any

49. nowhere -> anywhere

50. isn't -> aren't

a

34. its a long time since i last saw you

35. they asked john how he could repair that machine

b

the foreigner denied knowing anything about it