1. Sinh was in Ho Chi Minh City.

2. His uncle.

3. By bus

4. They got lost on the way home because they took the wrong bus. Then they took the right bus home in the end. It stopped across the street, about three blocks from their uncle's house.

. By bus

4. They got lost on the way home because they took the wrong bus. Then they took the right bus home in the end. It stopped across the street, about three blocks from their uncle's house.