Five years ago, I was sent to a better middle school. For me, everything there was new and strange. After I had been there for two months, there was an important test in the middle of the term. It covered all my courses. In that test, I didn't get a good grade, but most of my classmates got an A. It made me upset for a long time. I felt everything in the world was changing. I thought my classmates were all better than me. During those days I was very unhappy. One day, my aunt, after talking with my teachers, talked to me. She told me to think about what I had done in the past and what I should do in the future. I was shocked by her words. I thought about what I had done during the past months, and I found I had done nothing to improve my grades. I thought I should work harder. After that, I paid more attention to the teachers' talking in the classes, and I asked my teachers or my classmates when I didn't understand something. I studied very late at night when I met with difficult problems. Most of all, I came to understand the importance of taking notes in class. As a result, I did better in some tests. About three months later, the most important test came at the end of the term. _ From then on, I have tried to do my best when I do something because I know if I want something, I should work hard for it. Which of the following studying methods helped the writer most?  _
Asking teachers for help when in difficulty. Working deep into the night every day. Making notes in class. Listening to every word his teachers said.