94.The recent surge in the number of airplane flights has clogged the nation's air-traffic control system,to lead to 55 percent more delays at airports,and prompts fear among some officials that safety is being compromised.
C to lead to a 55 percent increase in delay at airports and prompt
E leading to a 55 percent increase in delays at airports and prompting
E正确可以理解。我想问的是C选项的解释中说：the meaning of 55 percent increase in delay is not clear. 但E选项中又说：the phrase a 55percent increase in delays is clear and concise. CE中都是a 55 percent increase in... 为什么解释矛盾？
谢谢大家的帮助！作者: a514116402c 时间: 2011-11-15 20:05
我觉得因该先看句子的结构，在看句子的表达含义；
用doing 修饰前面整个句子，而to do 显然不能。作者: wyyavv 时间: 2011-11-16 20:13
谢谢你! 明白了!!!
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