Решение:
Нужно выбрать наиболее подходящий предлог или слово для каждого предложения, чтобы они имели смысл.
- If you want to travel on long distances you can go by plane.
- You can also go by your car.
- You also might go by train.
- It is not a good idea to go on foot.
- Travelling by ship is not so popular.
- They went in their van.
- Nobody travels by lorry.
- They toured Latvia by camper.
- I think we will travel by a boat.
- They always go by helicopter.
Ответ: 1. by; 2. by; 3. by; 4. on; 5. by; 6. in; 7. by; 8. by; 9. by; 10. by.