How can you pause text to speech so that it restarts from where you left off??

I have a 40 page Pages document which is a transcript from a hand written diary. I wish to use Text to Speech to read passages from my Pages document so that I can check the text against the original version. This works well except that when highlighting a portion of text in the document and I wish to stop (pause) the Text to Speech it only starts at the beginning of the highlighted text and not restarting from the point of being paused.

If I use the start/stop keyboard shortcut in Text to Speech system preferences the situation is worse. No matter if you have a highlighted portion of text it will restart from the beginning of the document!!

So the question is How to pause the text to speech process rather than stopping it?