GWD-23-Q23 没找到讨论帖~ 麻烦大家了 就要考了！！~~~

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.
thx~~~



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
怎么分析呢？？  
-- by 会员 saya630 (2010/12/3 20:42:53)

首先while表同时，不能和then在一起，因为then表先后。
然后D乱改的，平行后面doing与前句过去时不对应错
C E考fall behind in +doing/n 没有its doing,所以最后选E
-- by 会员 小困蛇 (2010/12/3 22:07:22)