He waited with his companion the rescuers came, and then helped them carry her back down the mounta...
2023-02-14 18:47:01 17次 重庆市南开中学2010届高三4月月考 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He waited with his companion the
rescuers came, and then helped them carry her back down the mountain.
A.
when B.
until
C. unless D. while
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