29. C. only when they passed away
We often value the love and worth of a friend when he has been taken from US by death more than when he was with US in the flesh
30. C. we are so accustomed to good health
it is the sick and the ailing who realize the value of good health, when we are young and strong, we cannot imagine what it is to be weak and ailing. We are so used to vigorous health that we take it for granted.
31. B. unable to fulfil our expectations
It cripples our efforts so that we cannot accomplish many of the good and great things we might have done.
32. C. How to Keep Our Health