|1) Click at the top of the blank page to make it active (ie flashing cursor).|
2) Now press back-space key just enough times to make the blank page disappear.
3) Now re-save the document.
4) When you re-open it there should be no blank page.
Always works for me
Incidentally - there is no Word 7 that I'm aware of. I assume you mean Word 2007?