1.b Read the text. Make derivatives of the words in brackets so that they fit the text.

1. Nowadays, there are so many means of transport... that 1) **travelers** are spoilt for choice. 2. There are, however, some means of transport that have made an 2) **impression** on people... 3. The steam rotates a paddlewheel or 3) **propeller** that in turn causes the boat to move forward. 4. In the 18th century, there were many attempts to build better vessels, but it wasn't until 1807 that the first 4) **successful** steamboat... 5. Steamboats have now disappeared from most 5) **American** rivers... 6. 6) **Fortunately**, a small number of them are being used today...