1 because you do not have to change transport on your way.
2 when you visit new city or country
3 when you go by ship
4 each way is really interesting
5 yes, I have
6 если ты опаздывал(а) на поезд или автобус - yes, I have
Если нет - no, I have not
7 ваш отец ловит ли автобус добегаясь на работу - he catches a bus.
На метро - he goes by Metro
Пешком - he walks to work