1.about/30 km/my town/Ha Long Bay.
=>It’s about 30 km from my town to Ha Long Bay.
2. my family/use/go/holiday/seaside/summer.
=>My family used to go on holiday to the seaside in summer.
3. how/long/it/take/you/Ha Noi/Sa Pa/?
=>How long does it take you from Ha Noi to Sa Pa?
4. there/used/be/a/factory/town
=>There used to be a factory in the town centre but it has been moved to the suburbs.
5. you/must/ learn/about/road/safety/before/riding/your/bike/road
=>You must learn about road safety before riding your bike on the road.
Chúc bn hk tốt cho mk xin ctlhn pls