组卷网 > 高中英语综合库 > 语法 > 状语从句 > 时间状语从句
题型:单项选择 难度:0.65 引用次数:834 题号:3149922
We need to get to the root of the problem ________ we can solve it.
A.whileB.after
C.beforeD.as
2016·全国·一模 查看更多[17]
【知识点】 时间状语从句解读

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