in the mountains for a week, the two students were finally saved by the local police
A. Having lost
B. Lost
C. Being lost
D. Losing
网友回答
A. Having lost
(答案→)B. Lost
C. Being lost
D. Losing
解析：检查考生对非谓语动词的掌握和运用能力。首先，表示“失踪”用be lost；其次，语境中for a week，表示完成概念，所以用过去分词。