题目内容：

Could you imagine what it would be like if there were no other ways to get around except by using your feet? Not only would you wear out（磨破）a lot of shoes but it would take you a long time to get anywhere.

1. But that’s just the wheel(轮子); did you know that the earliest boats were dugout canoes(独 木舟)？People lit a fire on a big log(圆木) and then put the fire out and dug out the burned wood!

Then there were the Egyptians, who invented the sailing boat, but this could only be used in one direction.    2. Later the clever Romans came along and built their famous network of roads across the Roman Empire3.

Some of the roads did not last very long and they soon became dirt tracks(路). People travelled on roads by wagon(马车), but most things would be taken by sea in the 16th century. In the 19th century, some of the forms of transport that you know today were invented─the bike and the car. 4. The first underground railway in the world was built in London.

As it got easier to travel, people wanted to get to places faster. 5. It was first used in war, but now it has become an indispensable(不可或缺的) way of transport.

A. Do you know when the car was invented?

B. How many kinds of transport can you name?

C. Then the airplane came into being.

D. If the wind was blowing in another direction then they had to row the boat.

E. In addition, travel was made much easier by railways.

F. You really need to thank a few people for saving your poor shoes, like the person who invented the wheel!

G. So the Roman army could march(行军) from one part of the empire to another quickly!