It was not until the run had set that the hikers( )at the foot of the volcano.A arrived B did arrive

题目

It was not until the run had set that the hikers( )at the foot of the volcano.A arrived B did arrive C had arrived D would arrive 为什么选A?not until 不用倒装吗?求详细分析一下句子成分,

答案

not until 不用倒装吗?解析：当not until 放在句首的时候,句子使用倒装,这里没有放在句首,所以无需倒装.其实这是一个not until的强调句结构,恢复以后看结构比较容易 ：The run hadn't set until the hikers arrived ...