Write a letter to my dear teacher.

Dear teacher, do you remember the first time we met? At that time, you introduced yourself with energy. Now I still remember, in fact, when you introduced yourself to us, you still felt a little harsh. Later, as you spend more and more time with us, we know that you are not a strict person, but a girl who loves to laugh. You also told us that the reason why you introduced yourself so harshly before was because you loved to laugh, and you were afraid of laughing yourself.

Dear teacher, thank you because you have worked hard for us. You used to give us lessons when you were sick, and we said you were pretending to be sick. Excuse me, teacher. Another time, one of our former teachers came back to visit us. We were so busy playing with her that we forgot that you were still working hard for us. I know, you must have been in pain. Excuse me, teacher. Another time, you worked hard for us until after ten o'clock at night, but we said we slept later than you, teacher. At that time, your heart must have been hit hard again. Excuse me, teacher.