2015-2016学年 外研版 必修4Module 2 Traffic jam Integrating skills课件 (4)
2015-2016学年 外研版 必修4Module 2 Traffic jam Integrating skills课件 (4)第3页

What problem will come about if there is too much traffic in a city?

Suppose you are a mayor of London, and what measure will you take to solve the traffic problems caused by too much traffic?