In an hour,we can travel to places _____ would have taken our ancestors days to reach.填which or where,为什么先行词在从句中做主语，the place take sb.some time to reach 的句型对吗？
问题描述：
In an hour,we can travel to places _____ would have taken our ancestors days to reach.
填which or where,为什么
先行词在从句中做主语，the place take sb.some time to reach 的句型对吗？
答
which
这是由which 引导的定语从句,修饰places.