Perhaps I am courageous, but that’s beca

题目：

      Perhaps I am courageous, but that’s because I’ve had some inspiring teachers. I’ll tell you about one of them. Many years ago, when I worked    1  a volunteer at Stanford Hospital, I got to know a little girl named Liza  2 was suffering from a rare and serious disease, Her only chance of   3   (recover) appeared to be a blood transfusion (输血) from    4    five-year-old brother, who   5    (survive) the same disease and developed the antibodies needed to combat the illness. The doctor explained the situation to her little brother, and asked the boy      6      he would be willing to give his blood to his sister. I saw him hesitate for a moment     7     taking a deep breath and saying, "Yes, I’ll do it if it will save Liza."

As the transfusion progressed, he lay in a bed next to his sister,   8   (smile). But then his face grew pale and his smile faded. He looked at the doctor and asked with    9   trembling voice, "Will I start to die fight away?"

Being young, the boy had misunderstood the doctor. He thought he was going to have to give her   10   his blood.