As a teacher, I always think it right to teach my students to write about their true feelings and real experiences. But once I was puzzled about this. After explaining a text one day, I asked my students to write a passage about their families. All the students wrote quite well but the best of them all was the one written by a small girl. I was deeply touched by it. The girl's father had died years before and her mother had to work hard to support the family. Many times she had seen her mother working deep into the night but never seen tears on her face. Like her mother this girl also works hard at her lessons and she is really good at any of them. I even didn't know anything about her unlucky family. She always appears happy every day so she is really liked by us all, both the students and teachers. In order to make her an example to the class, I read this passage to the class. When I finished reading it I found my throat _ and my students' eyes full of tears. Some of them even wept in a low voice. After the class nearly all my other students wanted to hand in their pocket money for the daily use to help this girl. To tell you the truth, I was really proud of my students. But to my disappointment, this student of mine left the class even without telling me the next day. I don't know the reason why, can you tell me? The author asked his students to write about their families because he wanted them to   _  .
speak out open-heartedly tell him some stories about themselves make up some stories about themselves say something good to him