根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
        ．For example，too many tourists can crowd public places that are  also enjoyed by the inhabitants of the country. If tourists  create too  much traffic，the inhabitants become annoyed and unhappy．They begin to dislike tourists and to treat them impolitely．They forget how much tourism can help the country’s economy．It is important to think about the people of a destination country and how tourism affects them．         ．Tourism should also advance the wealth and happiness of local inhabitants．
          ．If tourism grows too quickly，people must leave other jobs to work in the tourism industry．This means that other parts of the country’s economy can suffer．
          ．Businesses can also lose money．It costs a great deal of money to build large hotels，airports， first-class roads，and other support facilities needed by tourist attractions. For example，a major international class tourism hotel can cost as much as 50 thousand dollars per room to build．If this room is not used most of the time，the owners of the hotel will lose money．
Building a hotel is just a beginning．There must be many other support facilities as well，including roads to get to the hotel，electricity，sewers(下水道)to handle waste，and water．          ．If they are not used because there are not enough tourists，jobs and money are lost.

A．It is extremely important to develop tourism

B．Too much tourism can be a problem

C．Without proper planning, tourism can cause problems

D．All of these support facilities cost money

E. Planning is of great importance to tourism
F. Tourism should help a country keep the customs and beauty that attract tourists
G. On the other hand, if there is not enough tourism, people can lose jobs