A、She thought the children were hopeless. B、She felt it hard to be in the teaching position. C、She was punished in a primary sch

　　Like lots of people, I never thought I’d be a teacher when I was at school. To be honest, I only did my training because my husband was on a four-year course and I was on a three-year course at Cardiff University. So I wanted to do something for one year. My first teaching practice as part of the course was in a primary school for three weeks. (19) Although it was fun, the kids were running wild. I didn’t feel I could control them. But when I went into a secondary classroom to teach my own subject, it was a completely different experience. (20) Passing on the love of literature was wonderful and I realized that I could never be bored with teaching since there is so much variety in the job. I’m convinced that nothing else I might have done would have given me so much pleasure and satisfaction, or fitted in so well with family life. (22)When I retire, in just a few years’ time, I can look back on a career which made a positive difference to the lives of thousands of children. Few other career choices can be so rewarding, so if you have a love of your subject and want the opportunity to pass that on, then teaching can be a great career. (21) One of the best things about teaching is that you get to raise children’s ambitions, and to make a difference in their lives. You get visits and emails from your previous students to prove it! It’s great to make the difference, and, as they say, it does make it all worthwhile.
　　19. What happened when the speaker began her teaching life?
　　20. Why did the speaker want to be a teacher eventually?
　　21. What is one of the best things about teaching according to the speaker?
　　22. What can we learn about the speaker?