题目内容：
完成选项 DDavid l&as a young man who worked in all office in a big city．His hobby was fishing，but he didn’t often get a chance to practise it．
Then one summer he decided to have a holiday in a beautiful place in the mountains whore there were a lot of streams．“I ought to be able to have some good fishing there．”he said to himself．
The first morning after he arrived，he walked to the nearest stream with his fishing-rod．He saw an old man standing beside the water，so he asked him whether it Was a private(私人的)．stream．The old man answered it Was not，so David then said to him，“Well．then it won't be a crime(犯罪)if I catch some fish here。will it?”
“Oh，no，”answered the old man．“It won't be a crime，but it will certainly be a miracle(奇迹)。”
David was________fishing． A．interested in
B．good at
C．expert in
D．not fond of
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