From the names of places we are often able to tell who the people in the past were.there are lots of towns and cities whose names end in -pool.we can be sure, even without reading history books, that the greeks settled in certain places during ancient times and gave them their names with polis whis means city in greek для каждого предложения какое время пожходит
Present Simple а вот это ( Greeks settled in certain places during ancient times and gave them their names with polis whis means city in greek ) Past simple