31. have studied                32. traveled
33. have you learned         3. stops, takes
35. was, heard , cried         36. is working
37. is going to rain            38. has used

31. have studied
32. traveled
33. have you learned
34. stops/ takes
35. was/ heard/ cried
36. is working
37. is going to rain
38. has used
39. bought
40. wanted
41. isn't/ is cooking
42. didn't speak
43. had joined
44. was having
45. was reading