Fill in the blanks with 'by', 'on', or 'in'.

1. on foot 2. by a bus 3. by the 8 o'clock train 4. by car/bus/plane/train/bike 5. We always go to school on foot. 6. I usually go to work by car. 7. He is travelling by the 6 o'clock train. 8. We like travelling by train. 9. How often do you travel by plane? 10. Don't talk to the driver on the bus.