小题1:B
小题1:A
小题1:D
小题1:D
小题1:细节题：从第一段的句子：The only chance to save her seemed to be a blood transfusion(输血)from her five-year-old brother. The little boy had the same disease before and had developed the antibodies(抗体)to fight the illness.可知是因为弟弟的抗体所以得救了。选B。
小题1:细节题：从最后一段的句子：He thought he would have to give all his blood to his sister, but he agreed.可知男孩因为自己的血都要给姐姐了。选A。
小题1:细节题：从第二段的句子："Yes, I’ll do it if it can save Lisa."可知男孩同意救姐姐。选D
小题1:推理题：从最后一段的句子：He was too young to understand the doctor. He thought he would have to give all his blood to his sister, but he agreed.可知男孩以为自己会死，但是还是同意救姐姐，所以作者印象很深刻。选D。