Travelers【T1】______into two categories: those who make lists and those who do not. Some people prefer to plan the course of thei

Travelers (11) fall into two categories: those who make lists and those who do not. Some people prefer to plan the course of their trip to the (12) finest detail. For others the joy of a trip is its spontaneity.
   Neither (13) approach works perfectly in South America. It is an area (14) that requires considerable preparation: internal flights often run only once or twice a week, and an advance (15) booking can mean the difference between continuing to a new city and waiting several days for another flight.