请教费费逻辑23 请教各位CDer逻辑开始的心态，我有点崩溃~~~好人进来～～自己有收获和考试经验必定涌泉相报

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.

　　(A) More than one or two airplanes were scheduled for the nine canceled flights.

　　(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.

答案A说取非削弱，B~D无关 我就是怎么也看不出来怎么削弱，诚信向各位请教！

还有咨询一下，我虽然刚开始复习逻辑不就，不记时间慢慢看，正确率一半以下。。。。说的很好的LAWYER感觉有点太抽象了条条框框的我和题目根本很难对应起来，我还是在努力看，但是心态很不好，越来越慌～～

恳请大家贡献下自己的经验，刚起步是这样吗，做逻辑的正确方法大概是什么呢，一道的时间应该是多少呢～～～

感谢赐教，快考试了～～ 各位复习、学习一切顺利！！！！！