阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。
Being the head of a high school for many years, I grew tired of budget meetings, funding cuts, and many other administrative chores (零星工作) and started to dream of retirement. Sitting in traffic on a weekday morning, I would find my mind 36 . I would imagine spending time with my grandchildren, quiet evenings with my 37 , traveling, or rediscovering some great books. I told myself that I wouldn't 38 myself up for any committees, any classes, or anything requiring a schedule.
