The two old sisters so long held each other and burst into tearsA. being separatedB. hav

问题补充：

The two old sisters， so long，held each other and burst into tears．

A. being separated

B. having been separated

C. having separated

D. had been separated

答案：

A. being separated

(答案→)B. having been separated

C. having separated

D. had been separated

解析：现在分词的完成被动式作原因状语，说明发生在谓语动词所表示的动作之前的被动动作。