The Gospel needs to be preached to the whole world then the end will come, how do Preterists respond?

Jesus said the gospel needs to be preached to the whole world (ends of the earth) first before the end of this age, however during the time (70-100AD) when preterists believe most of the end time prophecies were fulfilled, the gospel was not preached to the ends of the earth i.e. South America, South East Asia, Africa, North America. Our age is the age when the gospel has been preached to all corners of the world. >And this Gospel of the Kingdom shall be preached in the whole world for a testimony unto all the nations; and then shall the end come.(Mathew 24:14) How do preterists respond to this?