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 but then proved, 省略了主语，因为和前面一样
2、但是OG12 100 The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being so far away from the Earth that their apparent positions in the sky do not change enough for their movement to be observed during a single human lifetime.
A) The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being
B) Like the planets, the stars are in motion, some of them at tremendous speeds, but they are
C) Although like the planets the stars are in motion, some of them at tremendous speeds, yet
D) As the planets, the stars are in motion, some of them at tremendous speeds, but they are
E) The stars are in motion like the planets, some of which at tremendous speeds are in motion but
OG 关于yet being 的解释是， a comma before a coordinating conjunction (such as yet or but) introduces a second main clase, the second clause must have a subject and a verb: being must be replaced with they are 说了but 后面要跟完整句（ subject+ verb)作者: Gail小M 时间: 2011-4-20 23:19
actually , the subject can be omitted<however if there is a comma before but(and..),the repeat of subject is preferable.>作者: smallway 时间: 2011-4-20 23:53
So, is this an effectiveness thing rather than a correctness thing?作者: Gail小M 时间: 2011-4-21 00:08
correct！