【正确答案】A: Nowadays, the tourist industry has become a new and profitable industry in many countries. But in China, it is still underdeveloped. What do you think are the causes of the poor tourist industry? B: Personally, the underdeveloped infrastructure of tourism tops the list. A: What do you mean by saying "infrastructure"? B: Here infrastructure refers to those essential factors which play leading roles in the development of the tourist industry, to be more exact, they are transportation, service and the protection of natural resources. A: how are these factors closely connected with tourism? B: You know that China is a developing country. Although we have made rapid progress in economy, there are still things to be improved, such as poor transportation, unsatisfactory service and environmental deterioration etc. If travelers can not travel conveniently and smoothly during their travelling and always complain about the service they have received, you can imagine the future of this newly developed tourist industry. A: It seems that I suddenly get some ideas from what you have said just now. Let me go on with the topic. As for the protection of natural resources, I remember that the year of 2002 was named "the Year of Ecological Tourism". From this, we can see the importance of environmental protection in the development of tourism. We can not develop tourism at the cost of natural resources. B: You are quite right. What we'd like to see is a sustainable development of this promising tourist industry.