Correct the mistakes:
48. A. to move -> moving
49. B. to take -> taking
50. C. to understand -> of understanding
51. B. to damage -> damaging
52. B. to tell-> telling
53. C. to wait -> waiting
54. A. to swim -> swimming
55. A. to be -> to being
56. A. was thinking -> am thinking
57. C. to deal -> dealing
58. B. to advise -> advising
59. A. to watch -> watching
60. B. to see -> to seeing