are two reasons. First, air travel is quicker. Businessmen who value time regularly travel by aeroplane because of its speed. Second, travelling by plane is more comfortable than by ship. With the improvement of technology, many airline companies offer excellent services at a reasonable price.)

Group Discussion:

　　Advantages and disadvantages of the popular means of transport (ppt.15-20)

Ask students to read Part A on Page54 (PPT22), understanding different types of roads. Then in the form of "Question and Answer", students are asked to speak out these words. Meanwhile, the teacher is expected to write down some words on the blackboard.

Pictures of lanes or paths（PPT23）

Very small roads are called lanes, paths or foot passes.

Pictures of motorways freeways expressways and highways (PPT24)

Roads where cars can go very fast are called motorways in Britain, freeways or expressways in the USA.

Pictures of flyovers (PPT25)

Roads that go over other roads are known as flyovers or overpasses.

Roads that go through a tunnel are called underpasses.

Pictures of toll roads (PPT27)

If you have to pay to use the roads, they are called toll roads.

Pictures of an intersection and a junction (PPT28)

The area where many roads link up is called an intersection or a junction