What version of the bible do we have?

Key verse
John 17:3 - Now this is eternal life: that they may know you, the only true God, and Jesus Christ, whom you have sent.

Amos
In Amos, we see an example of how we have the Old Testament based on the Masoretic text (Hebrew version), whereas the first century church had the Old Testament from the Septuagint (Greek version).  Amos 5:25-26 reads rather differently than Acts 7:42-43, but if you follow the footnoting in your bible, you'll see that in fact, if we read the Septuagint version of Amos 5, the wording will be much the same as that in Acts 7.  Stephen, the fellow who was quoting from Amos, was not confused about what the Old Testament said.  In fact, he knew it quite well, only in Greek!