After several years of rapid growth, the health 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 答案为E作者: chy48339145 时间: 2010-3-20 16:21
while的转折有对比含义，而且要同时发生，跟then冲突，所以A,B都不能选 but then=on the other hand,固定搭配，主语相同时可省作者: 葛佳 时间: 2010-6-12 13:01
while 转折还要同时发生？ 这个是知识盲点 thank ls 但是D,but then proving unable[CH1] to handle the increase in business, falling months behind in paying