I've been going through a  document, making changes and adding comments.
The "Track Changes" option is on.
When I go back to the document, a few days later, I see some parts that I've
deleted and want to undelete.

The Review Toolbar has the buttons to accept or delete changes, but the
buttons are grayed out, so they can't be used.

I tried right clicking on the portion I deleted, but the only option
available is cut and paste. Then I realized the document is protected.

Is there anyway to put back a passage that I've deleted? On the document, it
shows up as crossed out. Or do I have to type it back in?

I am using Word 2003, in Windows XP.