About three years ago. I felt very    1    (孤独的). I didn’t like my classmates, my parents or anyone else. My classmates didn’t want to talk w  2   me . My patents always said that other kids were better than me. I thought I was the most unlucky person in the world.

One day I had a big fight with one of my classmates. I was very a  3    and I hit him in the face. Just at that moment, a boy stood up and s  4   the fight. He was the   5   (班长) of our class.

After that, he was kind and fine to me. He often helped me and we became good friends. Whenever I got sad or angry , he would help me to clam    6  .My life began to change. Now I become happier than before. And it s   7   that people around me change,too.  My parents don’t shout at me any l   8   and my classmates    9   (接受) me。I get    10   well with my classmates.

企业拟投资某项目，期望的报酬率为20%，当时货币的时间价值为5%，如果不考虑通货膨胀因素，则该项投资的风险报酬率为( )。

A．5%
B．15%
C．20%
D．25%