1. d

2. a

3. c

4.  b

5. a

6. b

VIII.

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 a holiday on the seaside in the summer.

4. How long does it take you to go from HN to Sa Pa?

5. There used to be a factory in the town centre but it has been moved to the suburbs.

6. You must learn about the road safety before riding your bike on the road.