21. A car is quite a big expense, especially when you consider maintenance.
22. A central zone leads to other areas where you can test yourself, gain information, do puzzles and so on.
23. A certain amount of mental arousal is necessary but too much causes you to lose confidence in your own abilities.
24. A change of clothing also lets you off the hook.
25. A child with low motor tone has much the same challenges as you would as you struggle on ice skates.
26. A church that stood upon a grassy hill and to which you mounted by a flight of steep stone stairs.
27. A class action can drive you crazy.
28. A closed-in, wormy kind of discomfort, if you forgive my saying so.
29. A cold night when all you have is your pride.