1 fewer->less
2 of->to
3 cut->cutting
4 In six years' time, we will be travelled across town by flying taxi.->In six years, we will be passing through town by flying taxi.
5 People from the countryside move to city to find work and a better standard of living.->People from the countryside move to the city to find work and a better standard of living.
6 When you were a child, you used to go to school on foot, weren't you?->When you were a kid, you go to school on foot, right?
7 Friday night, a friend of our from college came up to see us.->Friday night, one of our friends from the university came to see us.
8 Another Japanese city, Osaka, also has a very large population with 20.5 million.->Another Japanese city, Osaka, also has a very large population with 20.5 million.