B. To introduce a website.

　　C. To comment on popular

　　lists.

　　D. To recommend tourist activities.

　　B

　　The United States: Fliers may want to have their tickets in hand before catching their planes, but the airline companies are doing everything they can to bring forward costs-saving ticketless flights---no paper needed, just a ticket number and a photo ID(带照片的身份证). Anyone who buys a Northwest E-ticket through the airline's computer service by June 16 will get an award (奖励). Next time you fly, you can buy another ticket for a friend for $ 99, good anywhere in the US or Canada through Feb.12,

　　2000, along with the lowest ticket prices. Some airlines offer extra frequent-flier miles for the ticketless crowd. And there are rising punishments for paper lovers. American, Northwest, United, and last week, US Airways have raised the cost for lostticket replacement (替换) to $ 70 from either $ 60 or $ 50. The airlines insist that the increase in price is not meant to push travelers toward E-tickets but only covers the increasihg cost of replacing and tracking a missing ticket.

　　1. Why is the new ticketless flight introduced?

　　A. It is cheaper for air travelers.

　　B. It helps reduce the cost for airlines.

　　C. It can use computer to plan air traveling.

　　D. It helps prevent fliers from losing their tickets.

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