6._____inthemountainsforaweek,thetwostudentswerefinallysavedbythelocalpolice.

6._____ 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
为什么不选c 这个是不是属于省略句的原因 因为 省了 after the two students were lost 所以因为状语从句中主句主语 和从句主语一样所以省了 还是 ，，，是一种非谓语的用法。。说这个是形容词然后直接可以这样用，我听不懂这样的解释。。希望一言惊醒梦中人。谢谢了

现在分词表与主句谓语动作同时发生的事.
例:Being surrounded, the enemy was forced to surrender.
由于现已被包围,敌人被迫投降 (强调刚被包围的同时就投降了)
和你这个不一样

a.应该用having been lost，因为lost是形容词，sb is lost.或者sb is missing. c.losing 没有丢失的意思。不能用主动式。

此句相当于The two students have lost in the mountains for a week, finally they were saved by the local police,所以应选A