阅读下面短文，选择恰当的句子填入短文空白处，使短文内容完整、意思连贯。
I still remember very clearly my first visit to the dentist with my mother. 1_____ And they all looked
nervous. 2_____ I sat beside my mother, and she told me a story from a children's magazine. Some time
later, a nurse called us and led us into another room. 3_____ I saw a lot of strange things around me and
I was frightened. Then the dentist looked into my mouth. 4_____ After that, he said my teeth were fine.
I was glad the examination was over and was anxious to leave. 5_____ Later on in my life whenever I had
a toothache, I wished I had listened to him carefully.
A. She told me to climb into a big chair.
B. So I paid no attention when he showed me the right way of tooth brushing.
C. I began to worry.
D. And he examined every tooth carefully.
E. When I walked into the office, ! saw many people waiting.