阅读下面短文，按照句子结构的语法性和上下文连贯的要求，从1~15各题所给的A、B、C和D项中选出最佳选项。Fred had something important to tell his family. Everyone in his family 1 to sit at the dinner table and listen.
"I'm going to take part in the Olympics," he said.
"2 a fourth-grader do that?" asked Anna, his younger sister.
"I'm not going now. I'll go when I'm a little 3 ." Fred shook his head. "I've studied 4 the athletes become the best. That is practice. If I practice 5 enough, I can't fail."
"Sounds like a big challenge," said Dad. "Which sport will you take up?"
"I 6 up my mind yet," said Fred.
After a month's practice, Fred got hurt again and again when he 7 to find out which sport for him. "I don't think I can find a sport right 8 me," said Fred.
The following Sunday, the family sat down for dinner as usual.
"I've decided not to play a sport," said Fred.
Everyone was surprised.
"You're giving up on 9 Olympic dream?" said Anna.
"I didn't say I was giving up," said Fred. "I'm still going to the Olympics."
Anna looked puzzled. "How can you go 10 you don't do a sport?"
Fred held up a book titled Is Sports Medicine the Career for You? "Over the past few weeks, I've discovered that athletes need 11 medical help. So I am going to become 12 sports doctor. I'll still go to the Olympics — 13 as a doctor, not an athlete." Fred answered confidently.
"Now that is 14 challenge, Fred!" said Dad. "I'm sure you would do as well as you can 15 your dream."
