单选题 Over two-thirds of Americans now book their flights online. But when is the best time to book to get a cheap flight? Flying on Wednesday is a good way to save money; you"ll find emptier and cheaper seats. If you can"t avoid flying on a weekend, at least BOOK your flight on Wednesday; airlines tend to raise their fares on Friday and bring them back down on Monday. Another suggestion is to book your flight after the 7th of every month.

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【答案解析】超过三分之二的美国人现在在网上预订航班。但是，要买到便宜的航班，什么时候才是最佳的订票时间呢?在周三乘飞机是一种省钱的好办法；你会发现在这一天座位较空、价格较便宜。如果你无法避免周末乘飞机，那么至少在周三预订航班，因为航空公司往往在周五提高票价，然后周一再把票价降下来。另一个建议是在每个月的7号以后预订航班。[解析] book的意思是“预订”。save money的意思是“省钱”。raise fares的意思是“涨价”。bring fares down的意思是“降价”。