阅读下面的短文，从每小题所给的A、B、C、D四个选项中，选出可填入空白处的最佳选项，使短文意思完整。A three-year-old boy's dream of flying like the Superman came true.
The boy is Luke Campbell. He's really 1 to see his dream come true. However, 2 unlucky about him is that he has serious heart disease（病）.He 3 going to hospital when he was just six years old. Now,even the doctors are not sure 4 he is able to live.
A charity（慈善机构） heard about Luke and5 to help him. When they asked him about his 6 ,he chose to fly as the Superman. It is because his7 always calls him "Mom's little superhero" or "Super Luke".
On that day,his mother helped him8 like Superman. With a rope and with a special machine（机器）,the charity made him 9 in the air just like the Superman. When Luke was flying, 10 smiled happily and said, "I'm flying on my own,aren't I?"
It was 11 to see him being so happy and enjoying himself,and there was no one there 12 .He 13 do anything he wanted.
His mother said, "The wish made Luke be a child for the day,away from 14 and doctors."
Luke isn't going to stay with his family forever（永远），15 he left a special day for them to remember.
