听力原文：W: Alex is an English teacher in Iran and today we'd like to share his experience as a teacher. So welcome Alex. How do you enjoy teaching English as a foreign language? M: (23) I like teaching students how to speak. And I really enjoy seeing them learn and improve. I've been teaching for five years now, and I've got good experience from my classes. I teach in institutes and also university and they're a bit different because people who come to institutes (24) are highly motivated because they come with their own legs, as they say, as we say, and they're quite interested. They try to be active. But the students at university, because they have to pass some courses, they might not be interested enough most of the time. W: Well, you say that recently you've been trying to be a creative teacher, to stimulate students. So tell me about that. M: Well, most of the time I try to make them motivated by just making the class more fun and interesting. W: What do you find is the hardest part of being a teacher? M: Well, the hardest part is (25) that a teacher has to forget everything in his life before going to a class. W: What do you mean by that? M: You see, if you are sad, if you have a lot of ups and downs in your life, when you enter a class, you have to be a teacher full of energy, very happy. You have to forget about all your problems. If you just take your problems to the class, you won't be a good teacher. (20)