1. We used to go to school on foot.
2. It is about 30km from my town to Ha Long Bay.
3. My family used to go on holiday to the seaside in the summer.
4. How long does it take you from Ha Noi to Sa Pa?
5. There used to be a factory in the town centre but now it moves to the suburbs.
6. You must learn about the road safety before riding your bike on the road.