I have a number of inactive questions in our current survey and when a classmate clicks on "View Survey Results" the inactive questions also come up -- no answers obviously, but one classmate thought something was wrong because he couldn't get to all of the questions.

How can we prevent these from showing in the results without deleting the inactive questions? I really want to leave them because I might use them later when we get closer to our next reunion.

I would remove them... copy and paste them into a new survey for later. You never want to reuse a survey anyway.