请通读下面短文,掌握其大意,从每小题所给的四个选项中选出一个最佳答案。My mother was a nurse. She left home at 5:45 a.m., so I had to make breakfast and catch the bus by myself. I hated being left home alone in the1 . Mum worked day shifts(上白班)so she could2 me up after school.
One day, when we walked to our car, I saw an old man walking to us. He smiled at us, but I didn't know him.
"Leigh! Leigh!" he said, 3 my mother's name.
"Hello," Mum answered. "How are you feeling?"
"Couldn't be better! Thanks. Now who is this lovely young girl?" he asked 4 .
"This is my daughter," Mum said, looking over to me. "Jenny, can you say hello?" I looked at him and smiled.
"Well, nice to meet you! I hope you know how5 you are!" he said. I looked at him in doubt(怀疑), 6 I had no idea what he was talking about and I didn't feel lucky at all.
"You have the most wonderful mother," he said. "When I was in hospital last month, she took the best care of me. In fact, young lady, I will never 7 her."
I watched the look of joy on my mother's face. I suddenly know what it 8 for my mother to be a nurse. She was caring for those people, often during some of 9 times in their lives. At that moment, I 10 why I stood alone at the bus stop every moment.