The ones who had reached Earth's stage of culture a million or a billion years before?
We have now reached the stage where most of us can live here full time.
The first three of each group reach the main stage.
We have reached a stage where something has to be done.
It was half an hour before he reached the stage.
It was always the same when he reached a certain stage in a difficult case.
I've reached the stage when I really don't care what happens to me.
In the short term a number of new systems are expected to reach the second stage.
I've reached a stage where I could do justice to any role that came my way.
It might reach the stage where if you have the right degree, you're in.