Without proper planning，tourism（旅游业） can cause problem．For example，too many tourists can make public places crowded，which are also enjoyed by the local people．If tourists cause too much traffic，the local people will feel unhappy．They begin to dislike tourists and treat them impolitely．But they forget how much tourism can help the local economy（经济）．It is important to think about how tourism affects the local people．The local customs and beauty should be kept to attract the tourists by the local government．The local government should also care about the health and happiness of local people when developing tourism．

Too much tourism can be a problem．If tourism grows too quickly，people can leave other jobs to work in the tourism industry because they can make more money there．As a result，other parts of the local economy can become worse．

On the other hand，if there is not enough tourism，people can lost jobs，and businesses can also lost money．It coats much money to build large hotels，airports，firstclass roads，and other support facilities（设施） needed by tourist attractions．For example，each room of the firstclass tourism hotel usually coats about 50thousand dollars．If the rooms of the hotel aren't used most of the time，the owner of the hotel will lose money．

Building a hotel is just a beginning．There must be many support facilities as well，including roads to get to the hotel，electricity and so on．All of these support facilities cost money．If these facilities are not used because there are not enough tourists，jobs and money are lost．

根据上面短文的内容回答问题．

66．How will the local people feel if tourists cause too much traffic？　　

67．Is developing tourism helpful for the local economy？　　

68．What should be kept by the local government to attract tourists？　　

69．Why can people leave other jobs to work in the tourism industry？　　

70．How much does it usually need to build a firstclass hotel room？　　

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