阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
Jane had been teaching for nine years but intended to drop out. I offered to observe her class for a day to see what caused this 41 .
As the day began, a flood of cheerful students 42 through the door, excited la start their day! Once the class was 43 , I noticed two students constantly arguing with each other, 44 Jane's time and attention. I could see 45 arise in Jane as she constantly glanced at them 46 throughout the morning,ready to seize if they got out of line.
After class was over, Jane sighed, “What a 47 day…”“No，it was really wonderful. ”“But Carl and Joey were always 48 us. I said their behavior was pretty normal for I hat age and that I noticed the other students were deeply 49 in learning.
She had focused so much on the few 50 students [hat she had missed out on celebrating the many 51 learning moments. I offered a way to help her make a 52 --Invite students to write down good things every day.
Jane took to this 53 and created a bulletin board, with “GOOD THINGS HAPPEN” atop. To her 54 ，the first day 15 pieces were posted. 55 ，Carl arid Joey got excited and wanted to be part of it. It was an opportunity to 56 their bhavor.Realizing it,Jane
began 57 them when they were doing the right thing, and soon they were us engaged as the other students.
Several month later I 58 with June to see how things were going. She laughed. “I love my job!”
