Ex1
1. We used to go to school on foot.
2. It's about 30km from my town to Ha Long Bay.
3. My family used to go on holiday to the seaside in summer.
4. How long does it take you to go from Ha Noi to Sa Pa?
5. There used to be a factory in the town centre but it moved to the suburbs.
Ex2
1. Did you use to go to the beach when you lived in Nha Trang?
2. Mr and Mrs Smith are travelling by plane to Ha Noi now.
3. Van used to have a motorbike.