Although ______ for many years, the two old sisters recognized each other at once.
A. having been separated B. being separated
C. having separated D. had been separated
Although ______ for many years, the two old sisters recognized each other at once.
A. having been separated B. being separated
C. having separated D. had been separated
A
A考查非谓语动词用法。前后主语一致并且前边动作发生在后面的动作之前，故用现在分词的现在完成时。