1. It’s over 100km from my home town to Ho Chi Minh City.
2. It is about 25km to my grandparents’ house.
3. I used to ride a small bike in the yard outside my flat.
4. There used to be a bus station in the city centre, but it was / has been moved to the suburbs.
5. Children must learn about road safety before they are allowed to ride a bike on the road.
⇔ Cấu trúc : It's+ about + from ... to ....
S + used to + V(bar)+O
$@yenngoc$