Here are the completed sentences:

56. He spent lots of time doing this experiment.
It took **him a lot of time to do this experiment.**

57. Anna spent three days visiting Japan.
It took **her three days to visit Japan.**

58. I spend two hours doing my homework every day.
It takes **me two hours to do my homework every day.**

59. It took me all the morning to prepare for lunch.
I spent **all morning preparing for lunch.**

60. It took my son three years to study in this college.
My son spent **three years studying in this college.**