题目

Being content with yourself and optimistic about your future is not difficult. Whatever is in the past is   36  . Learn from it and move on. When you are enough   37   to do this, you will see that moving ahead is the best definition of living   38  .  What can you do now? Sure it is   39   for me to tell you to forget the past,   40   it is a whole different   41   to actually do it. Life is a complex set of events, much of which   42   is real, but a large amount is just your   43   of what really happened. Let me   44   with an example. I know noThe ants talk a great deal ________. [　　] A．by these means B．by this means C．in these means D．in this means