摘要：主题：如何购买实惠的飞机票体裁：说明文题材：交通旅游难度系数：★★★ If you are planning on booking some flights over Christmas or to see in the New Year overseas,don’t book on a Friday.New research has revealed that prices of tickets booked on this day can be as much as 13 percent more than if you wait a couple of days and book on a Sunday.

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