#90 has been partially answered in
The Cold Shoulder and fully answered in
She\'s, both stories by me. I suggest some hankies or a box of tissues along with some recovery time for either one. (I say that only because of the feedback each of these tales generated.)
/end shameless plug
And let me add another one.
92. What if Lois hadn't come back from the Congo? How long would Clark look for her, and when (if ever) might he give up?