I have a love-hate feeling with 8 o' clock classes. I like to get started that early, but most students don' t.They usually came in late and looked sleepy at that hour.

 One day I was really angry r at it. I was excited about the history lesson, but no one else seemed to be. I wrote things on the blackboard. I moved around the room. I told stories. I tried humor. It was useless. Their looks didn't seem to change. I was frustrated. I forgot to keep time. I was going to talk more when I looked down at my watch. It was already two minutes past the end of class. So I just ended suddenly and soon the students began to pick up their book bags and rushed out the door on their way to another class.

 While I was watching them leavings I put away my own books, notes and papers. I took them up and stepped out into the hall. I was tired and a bit sad. I had put everything I knew into that class and it had not seemed to work. Then, as I started across the hall to my nearby office, a student came out the back door of the classroom and caught up with me.

 Randy sat at the back of the classroom. I thought he wanted to ask why I didn't correct their exam papers or maybe he wanted to ask for leave or... It was none of that. With his eyes sparkling (闪烁)，Randy said, “ This is the first time I 've not wanted a college class to end."

 The tiredness lifted.I had done better than I thought. I don, t know if Randy will ever understand how much he did for me that day.

问题：The teacher have a complicated feeling with 8 o' clock classes because（）.