题目

Without proper planning, tourism can cause problems. For example, too many tourists can crowd public places that were also enjoyed by the inhabitants(居民)of a country. If tourists create too much traffic, the inhabitants will become unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help a country's economy(经济).It is important to think about the people of a destination(目的地)country and how tourism affects them. Tourism should help a country keep the customs and beauty that attract tourists. Tourism should also advance the 一本书有398页，乐乐看了193页，大约还有多少页没看？（3分）