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[Sentence Correction]
试题详情
题目：
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.
选项:
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:
E
提问：
老师 您好 我选择的是C 我想问一下 fall behind in doing sth是idiom吗 但是E选项 but前面有逗号 but后面可以把代词省略吗
解答：
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