1. (2021高二下·安徽竞赛) 听下面一段对话，回答问题。

1. （1） What is the speaker talking about?

   A . The development of transport. B . Different countries around the world. C . Transport systems in different countries.
3. （2） What contributes most to the development of Colombia's air transport?

   A . Its tourism demand. B . Its commercial development. C . Its geographical conditions.
5. （3） What do we know about Colombia's railway system?

   A . It is out of date. B . It increases the foreign trade. C . It has a network of about 48, 000 km,
7. （4） How many airports are there in the UK?

   A . About 90. B . About 150. C . About 400.