【正文】 fewer traffic accidents?！? very expensive to build。 … relatively expensive。 Cause pollution。 The safety of the trip would be affected by storms。Unit 4 Public transport Wele to the unit Where have you been to? How did you go there? Brainstorming public transport buses coaches trains underground ships maglev trains aeroplanes … Different means of transport In the 19th century, ___________ helped transport people all over the world. steam trains _________ have routes. They pick up and drop off people at different places on the route. It is a popular means of transport within a city. Different means of transport Buses _______ were a popular way to travel from place to place in the 20th century. Different means of transport Ships ________ are buses that carry people over long distances. Different means of transport Coaches In the 19th century, roads became crowded in cities and so ______________________became popular. Different means of transport underground trains ____________ are used to travel quickly over long distances. Different means of transport Aeroplanes The ______________ is a new form of transport. It is powered by mags. maglev train Different means of transport Questions 1. What is the difference between a bus and a coach? The main difference between the two is that a bus often travels on a fixed route while a coach is the means of transport for people who travel to a relatively faraway place. Both of them look very similar, but in most cases a coach is designed for longdistance travellers, so you won’t be surprised to find a coach equipped with air conditioning, seats with cushions and DVD players. In contrast, a bus appears very plain. There are two reasons. First, air travel is quicker. Businessmen who value time regularly travel by ae