he boys followed the marks that they ________, until finally they found their way back to the campsi...
2022-10-27 00:00:47 123次 2013-2014学年湖南省长沙市高三第二次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
he boys followed the marks that they ________, until finally they found their way back to the campsite.
A. left B. have left
C. had left D. have been left
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