Sure! Here are the completed sentences:

1. Some people don’t like travelling on the **bus** in London because you can’t see the city.
2. Crossing the English Channel by **ferry** is the cheapest way to get to France.
3. Sailing in a **boat** can be difficult if there’s no wind.
4. Steve Fossett was the first man to travel solo in the air round the world in a **hot air balloon**.
5. A lot of schools use a **bus** to take students on school trips.
6. In New York all the **taxis** are yellow and in London they’re black.

If you need any more help, feel free to ask!