阅读理解。 请先通读下列短文，然后从所给的七个选项中选出能填入空格的最佳选项。

问题：

阅读理解。

请先通读下列短文，然后从所给的七个选项中选出能填入空格的最佳选项。

     Without proper planning, tourism can cause problems. 　  1  . If tourists create too much traffic, the

inhabitants become angry 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. 　  2  . 　　

     Tourism should also improve the health and happiness of the local inhabitants. 　　

     Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to

work in the tourism industry. 　  3  . 　　

     On the other hand, if there is not enough tourism, people can lose jobs. Businesses can also lose money.

It costs a great deal of money to build large hotels, airports, first-class roads and other support facilities

(设施) needed by tourist attractions. 　  4  . If this room is not used most of the time, the owners of the

hotel 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, sewers to handle waste, and water.　   5   . If they are not used because there are

not enough tourists, jobs and money are lost.

A. This means other parts of the country's economy can suffer 　　

B. Tourism can bring a lot of benefits 　　

C. For example, too many tourists can crowd public places that are also enjoyed by the inhabitants

   (the people living there) of a country 　　

D. For example, a major international-class tourism hotel can cost as much as 50 thousand dollars

    per room to build 　　

E. All of these support facilities cost money 　　

F. Therefore, tourism plays an important part in local economy 　　

G. Tourism should help a country keep the customs and beauty that attract tourists