Many years ago, when I worked as a volunteer at Stanford Hospital, I got to know a little girl __41__(name) Liz who was suffering from a rare and serious disease. Her only chance of recovery appeared to be a blood transfusion(输血) __42__ her 5-year-old brother, __43__ had miraculously survived the same disease and had developed the antibodies needed to fight the __44__(ill).
The doctor explained the situation to her little brother, and asked the boy if he would be willing to give his blood to his sister. I saw him hesitate for a moment __45__ taking a deep breath and saying, “Yes, I'll do it __46__ it can save Liz.”
__47__ the transfusion progressed, he lay in bed next to his sister and smiled, as we all did, _48__(see) the color returning to her cheeks. Then __49__ face grew pale and his smile faded. He looked up at the doctor and asked with a trembling voice, “Will I start to die right away?”
Being young, the boy had_50__(understand) the doctor; he thought he was going to have to give his sister all of his blood.
41.named 42.from 43.who 44.illness 45.before
46.if 47.As 48.seeing 49.his 50.misunderstood