Some teachers seem to be bad teachers, but they are not. Take my football coach for example. One day, we were doing some 1 practicing catching the football. He threw me a pass and I dropped it. He started 2 me. I went back in line, 3. My friend was up next. He dropped it, too. But the coach said nothing. Annoyed, I whispered, "Why 4 against me?"
After practice he came 5 to me and told me the reason he shouted at me 6 the other guy was that he expected more out of me. If he 7 my mistakes, it meant he had quit on me.
Another teacher 8 my mind was my PhD supervisor, Ken Crowe. He had a(n) 9 for making grown men cry when they disappointed him, but I was 10 by the topic he was working on.
He gave me a(n)11: to figure out what caused muons to get depolarized (去极化) in liquids. After a week I came to Ken's office to tell him about it. He listened for a few minutes and then 12: "You have no idea what you're talking about! Get out and don't come back until you do!" Now I was starting to get 13, complaining about him as cold-hearted.
Bent on changing his attitude and 14 more relevant knowledge, I really got into it. 15, I understood it so well that to this day it is my most proud 16. Then I went back to tell Ken what I had figured out. Again he interrupted me a few minutes into my 17, but I carried on. When I finished, he praised me for doing some very original research. From that day forward, he supported and promoted me 18 we became great friends and respected colleagues.
So don't ever complain about your "19" teachers. They may 20 you to make greater achievement you will be proud of decades later.