标题: 在做PREP的时候突然遇到一点疑问--急 [打印本页] 作者: arwing 时间: 2011-1-16 15:25 标题: 在做PREP的时候突然遇到一点疑问--急 在做PREP的时候发现一题： After several years of rapid growth, the healthy care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its payment to doctors and hospitals.
A. while it then proved unable to handle the increase in business, falling months behind in its payment to B. while it then proved unable to handle the increase in business and fell months behind in its payment to C. but then it proved unable to handle the increase in business, falling months behind in its paying D. but then proving unable to handle the increase in business, falling months behind in paying E. but then proved unable to handle the increase in business, falling months behind in paying