While ______ the mountain area, all the men carried guns lest they should be attacked by wild animals.

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问题 While ______ the mountain area, all the men carried guns lest they should be attacked by wild animals.

选项 A、crossing
B、crossed
C、they cross
D、to cross

答案A

解析独立主格，all the men是主语，前一句又表示主动含义，所以不选择B项，C项多主语了，D项格式不对。

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英语

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