问题描述：
请分析下列句子成分及语法
36.We’re safer in a train than we would be if we ______ any other way.
a.traveled b.had traveled c.travel d.have traveled
36.We’re safer in a train than we would be if we ______ any other way.
a.traveled b.had traveled c.travel d.have traveled
问题解答：
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