Nearly three months had gone by the seriously injured girl showed a slight sign of recovery.
A. until
B. after
C. since
D. before
网友回答
A. until
B. after
C. since
(答案→)D. before
解析：连词辨析。A直到…才；B在…之后；C自从；D在…之前；句意：几乎三个月以后那位受伤严重的女孩慢慢地显示出康复的迹象。Before与一段时间连用，翻译成一段时间以后。故D正确。