23. On a certain day, nine scheduled flights on Swift Airlines were canceled. Ordinarily, a cancellation is due to mechanical problems with the airplane scheduled for a certain flight. However, since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, some of the nine cancellations were probably due to something else.

(B) Swift Airlines has fewer mechanical problems than do other airlines of the same size.

(C) Each of the canceled flights would have been longer than the average flight on Swift Airlines.

(D) Swift Airlines had never before canceled more than one or two scheduled flights on a single day.

(E) All of the airplanes scheduled for the canceled flights are based at the same airport.

scheduled flights 究竟是什么意思呢? 为何选A 呢?百思不得其解中~~~

意思是在某一天，该航空公司取消了9个计划航班，其中的一个被取消的原因是飞机机械故障。但是由于该航空公司很少出现同时有多于2架飞机发生机械故障的情形，所以这被取消的9个航班中可能有些是由于其他原因造成的。

注意，航班不等于飞机。所以，要想让以上说法成立，要求至少3架飞机来执行这被取消的9个航班。也就是A的选项所表达的意思。