223. (GWD-23-Q23) 求教~~~~~~~~~~

secretsoft

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
答案是E
问题1：为什么C中的it可以省略，我记得如果是, and的话，前后两句的句子都要完整呀。为什么,but 后面的主语就可以省略呢。
问题2：E的解释是说什么主动表被动。。。这个不理解
问题3：这个prove是主动发出的么，我怎么感觉应该是被prove的意思


万分感谢~~~~~~

secretsoft

Become和prove并列，I play football and i read books.第二个I是不是wordy？
prove在这里是终止性动词，意 ...
saffsa761 发表于 2013-5-26 08:19

THX~~~但我还有一个疑问是：这个句子的结构是become xxx, but prove xxx.跟另个句子become xxx but prove xxx有什么区别吗。就是这里的,的存在产生了什么影响

secretsoft

THX~~~但我还有一个疑问是：这个句子的结构是become xxx, but prove xxx.跟另个句子become xxx but prove xxx有什么区别吗。就是这里的,的存在产生了什么影响