first time I learned Korean. I would not have had a chance to tell that she can do it if I had given up on that day.

I began to learn Korean because I discovered Korean language and grammar fascinating and I could express myself in ways I never could do in English. In the following years, I challenged myself and pushed myself harder to do things that I hadn't thought I could do.

Jane's words made me learn I could share my knowledge by being a Korean language teacher. When realizing my Korean was limited, I decided to try my best to get a master's degree in Korean Language Education. I also tried to spare time to learn Korean on the Internet. Reading Korean textbooks, listening to music and watching dramas didn't help me much, so I took the short-term Korean program at Ewha Language Center. I came to my Korean friend's house to have dinner. Her family was surprised when I told them that I knew how to make Gimbap and when I said goodbye in Korean when I left. They appreciated that I quickly got used to the language and culture, which made me more confident about speaking Korean.

I made practical use of my knowledge by working as a volunteer teacher in a local school. I worked hard to explore different teaching ways, making my students enjoy my class. I made sure that I had all of the materials that I needed before class started. Moreover, I tried to help develop and improve students' learning abilities. Now I strongly believe that my research experience, responsibility, leadership, and enthusiasm will help me become an excellent Korean language teacher.

21. What did the author do when hearing her student's question?

A. Realize the great power of Korean.

B. Feel it necessary to work much harder.

C. Praise her student's willingness to learn.

D. Remember her past personal experience.

22. Why did the author want to get a master's degree?

A. To achieve her dream.

B. To try to improve herself.

C. To gain more confidence.

D. To better help her student Jane.

23. How was the author like as a volunteer teacher?

A. Being very strict.

B. Being very patient.

C. Being well prepared.

D. Being quite inexperienced.

　　Destinee Whitaker was in fourth grade when she learned that millions of people around the world lack clean water.

　　"It was a problem that confused me for a long time," said Whitaker, from the United States city of Philadelphia. "Water is a necessity."

When she got to Carver High School of Engineering and Science, Whitaker carefully researched the problem and felt that she must do something about it.