1.It is 150 million kilometres from Earth to Sun.
2.It is 105 km from Ha Noi to Hai Phong.
3.It is not very far from here to Tan Son Nhat Airport.
4.It is a long way to go from Hue to Ho Chi Minh city.
VII.
1.How far is it from your house to the bookstore?
2.Mai used to go to school on foot when she was in a primary school.
3.It is very important to obey the traffic rules when using the road.
4.It is ten kilometres from the town to the airport.
5.Did you use to have tricycle when you was a child?
VIII.
1.I used to stay up late to watch football matches last year,but now I don't.
2.There used to be some trees in the field,but now there aren't any.
3.Anna used to live with her parents,but now she doesn't.
4.He used to be a poor man,but he becomes a rich businessman.
5.They didn't use to go to the cinema every Sunday last year.