（2018•北京）A rescue worker risked his life saving two tourists who _________ in the mountains for two days.

题型：单选题题类：真题难易度：困难

2018年高考英语真题试卷（北京卷）

A rescue worker risked his life saving two tourists who _________ in the mountains for two days.

A、are trapping B、have been trapped C、were trapping D、had been trapped

举一反三

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