从句的主语可以省略吗？求高手解答

christinho

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

答案是E。但是我有个疑问，为什么but后面那个从句的主语the health care company可以省略呢？不是两个句子吗。the health care company become..., but then proved...这样的句型正确吗

sheikh239

这不是从句， 一个主语 两个动作罢了。把but 理解成and ，then可以省略