阅读下面的短文,掌握其大意,然后从下面四个答案中选出一个最佳答案。
When I was 13 years old, a boy gave me an important gift. It was a1
It was the early autumn of my2year at a junior high school, and my old school was far away.3, no one knew who I was. I was very4, and afraid to make friends with anyone.
Every time I heard the other students talking and laughing, I felt my heart5I couldn't talk to anyone about my problems. And I didn't want my parents to6me.
Then one day, my classmates talked happily with their friends, but I sat at my desk unhappily7At that moment, a boy8the classroom. I didn't know who he was. He passed me and then turned back. He looked at me and, 9.
Suddenly, I10the touch of something bright and friendly.11made me feel happy and warm.
That smile12my life. I started to talk with the other students and made friends. Day by day, I became13to everyone in my class. The boy with the lucky smile has become my best friend now.
One day I asked him why he smiled, but he couldn't14smiling at me!
It doesn't15because all the dark days have gone. Now I believe that the world is what you think it is. If you think you are lonely, you might always be alone. So smile at the world and it will smile back.