通读下面短文，掌握其大意，然后从所给的A，B，C，D四个选项中选出最佳选项。
Like any other good mother, Karen did whatever she could to help her three-year-old son, Michael, get prepared for a new baby when she found out that another baby was on the way. They 1 out that the new baby was going to be a girl, and day after night, Michael sang to his 2 in Mommy's tummy(肚子）.
Finally, Michael's little sister was born. But she was in 3 condition. The baby was sent to St. Mary's Hospital. Days went by. The doctor told the parents "There is very little 4 . Be prepared for the worst."
Michael kept asking his parents to let 5 see his sister. "I want to sing to her," he said. Two weeks passed. It looked as if the worst situation would come before the week was over. Michael kept asking about singing to his sister, but kids were 6 allowed in ICU. However, Karen made up her mind that she would take Michael to see his sister who was sick.
She 7 him in an oversized scrub suit(消毒服） and went into ICU. The head nurse shouted, "Get that kid out of here now! No children are allowed." Karen said firmly," He is not leaving 8 he sings to his sister!" Michael was sent 9 his sister's bed. He began to sing. In the sweet 10 of a three-year-old, Michael sang: "You are my sunshine, my only sunshine; you make me happy when skies are gray..." 11, the baby girl moved. The pulse rate(脉搏） became calm.
Michael kept on 12, "You never know, dear, how much I love you. Please don't take my sunshine away..."The breathing became smooth.
Michael kept on singing, "The other night, dear, as I lay sleeping, I dreamed I held you in my 13 ..."Michael's little sister relaxed.
Michael kept on singing, "you are my sunshine, my only sunshine. Please don't take my 14away."
The next day, the very next day, the little girl was 15 enough to go home!
The doctors just thought it a miracle(奇迹）. Karen called it a miracle of love!
