Without proper planning, tourism can cause problems. For ex-ample, too many tourists can crowd public places that are also enjoyed by the inhabitants of a 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 help a country keep the customs and beauty that attract tourists. Tourism should also advance the wealth and happiness of 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. This means that other parts of the country's economy can suffer.
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, air terminals, first-class roads, and other support facilities （配套设施）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 lose money.
Building a hotel is just a beginning. There must be many sup-port facilities as well, including roads to get to the hotel, electricity, sewers to handle waste, and water. All of these support facilities cost money. If they are not used because there are not enough tourists, jobs and money are lost.
Which of the following do you think has been discussed in the part before this selection?

A．It is extremely important to develop tourism.

B．Building roads and hotels is essential.

C．Support facilities are highly necessary.

D．Planning is of great importance to tourism.

The underlined word " inhabitants "（in Paragraph 1） probably means __________.

A．tourists	B．passengers
C．population	D．citizens

Too much tourism can cause all these problems EXCEPT __________.

A．a bad effect on other industries

B．a change of tourists' customs

C．over-crowdedness of places of interest

D．pressure on traffic

The author thinks it is good for local people to know that tourism will __________.

A．waste a lot of money

B．weaken their economy

C．help establish their customs

D．help improve their life