He is only _____ 8-year-old boy.

A.an　　 B.a　　 C.the D./

阅读下列短文，从文后所给A、B、C、D四个选项中选出一个最佳答案。
John Thomas was an 18-year-old student, but he had been a famous champion (冠军).  Everybody at Boston University liked this tall, quiet boy. Once he was hurt, everybody at Boston University was  36  . People all over the country  37  about John Thomas and often asked, "Will he ever jump again ?"
John' s mother went to the hospital to see her son. She looked at his 38 leg. Then she looked into his  39  .She knew what her son would  40 . "You're going to jump again, John, I know it," she said. "  41  will be all right. "
If John hoped to jump again, he would have a  42  to do. He began at once. Even in his hospital bed John started to exercise. He used a wheel(轮子) and other metal things. Soon his  43  looked like a machine shop!
It was May when John  44  the hospital. "Is it all right if I go camping( 宿营) this summer?" he asked the doctors.
" Yes," the doctors said.  " But take it easy on that foot. "
John took only  45 walks at first. He was taking it easy on his foot. But not on anything else. He went swimming and did other kinds of exercises. He exercised  46  his body cried for a rest. Some days later, he exercised a little  47  . In late summer John went back to  48  . He asked if he could practise with the football team. Football wasn't his favorite, but he had to get that leg  49  again! He worked hard. "No one pushed him as hard as he pushed himself," said one of his friends. "To  50 a champion fighting back is a wonderful thing to watch. ":

A 14-year-old boy from the USA was described as a hero yesterday after he saved the life of a woman in another country．

Dean Bluey from Dallas，Texas，was a school boy who has much  31  in computer．One day，he  32  an email to a friend on the Internet．Suddenly he received a message saying “Help! Pain! Help!”．"The message was from Finland，  33  kilometers away from America．

“I didn't know  34  I should do，”Dean said to a reporter afterwards．“It was really difficult to tell if the message was real．”So Dean did nothing at first． 35   the message kept coming．

“By then it was easy to see that someone was in trouble,” Dean explained. He   36  and discovered that the sender was a student called Tarja, who was alone in a university library. She was ill. What was  37  , there was no phone around her. Her only way of communicating with the world was by email. Dean got in touch  38   the police immediately. And they realized that the situation was quite serious. They called the police in Finland. Then an ambulance rushed to the library.   39  , she was still alive and was sent to the hospital quickly.

“I'm glad she's OK,” Dean said. “It's hard to believe, but   40   saved her life.”