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Many years ago, when I worked as a volunteer at Stanford Hospital, I got to know a little girl 16 （name） Lisa who was suffering from a rare and serious disease．Her only chance of recovery appeared to be a blood transfusion 17 her five-year-old brother, 18 had miraculously （奇迹般地） survived the same disease and had developed the antibodies （抗体） needed to fight the 19 （ill）．
The doctor explained the situation to her little brother, and asked the boy 20 he would be willing to give his blood to his sister．I saw him hesitate for only a moment before taking 21 deep breath and saying, “Yes, I’ll do it if it can save Lisa．”
As the transfusion progressed, he lay in a bed next to his sister and 22 （smile）, as we all did, seeing the color returning 23 her cheeks．Then his 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 24 （understand） the doctor; he thought he was going to have to give her all 25 blood．named 17．from 18．who 19．illness 20．if / whether 21．a 22．smiled
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(答案→)named 17．from 18．who 19．illness 20．if / whether 21．a 22．smiled
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