组成CPU的主要部件是______。A．运算器和控制器 B．运算器和存储器 C．控制

     There was a blind girl who hated herself because she wasn't able to see anything. In fact, she    1    
nobody except her boyfriend, for he was always    2    to help her. She often told her boyfriend, "If I could
see the    3   , I would marry you."
     One day, someone donated a pair of    4    to her. When the bandages (绷带) came off, she was able
to see everything, including her boyfriend, for the    5    time. He asked her, "Now that you could see
everything, will you    6    me?" The girl looked at her boyfriend and was greatly surprised to see that he
was     7   . She had never hoped that. She wouldn't like to be with a blind husband for the rest of her life,
so she    8    to marry him.
     Her boyfriend left in tears and a few days later wrote a    9    to her, saying, "My dear, take good care
of your eyes.    10    they are yours, they were mine."
     This is how the human brain (人脑) often works when our status (地位) changes. Only a very few
remember what   11    was like before. And we often ask for more than we need. Life is a gift. Today,
before you complain (抱怨) about    12    of your food, think of someone who has nothing to    13   .
Before you complain about your old    14   , think of the people who are living in the streets. And when
you are tired and complain about your job, think of those who have no jobs. So    15    what you have and
don't forget your past.