Question

Answer 1

36. D (-> cleaning/ to be cleaned)

37. C (-> going)

38. D (-> complaining)

39. D (-> doesn’t he)

40. have you (-> did you)

Answer 2

36. to clean => to be cleaned

37. go => going

38. to complain => complaining

39. isn't he => doesn't he

40. didn't you => haven't you