【答案与解析】本文主要讲述了19个瑞典男孩 Jonathan 凭借自己出色的电脑技术帮助美国联邦调查局寻找网络犯罪分子。
1. A. 主旨题。根据 …he helps the US Federal Bureau of Investigation(FBI) find out the world’s most wanted cyber criminals 可确定答案。
2. B. 细节题。根据 Jonathan first made headlines when he and another Swede, Fredrik Bjoerck, found out the maker of the “Melissa” virus(病毒) in March 1999 可推测出答案。
3. B. 推断题。根据 He said his work on the “Melissa” virus, which took three weeks to solve, was a big help in finding the suspect so quickly 可以看出，以前积累的经验对他以后的工作大有帮助，故 B 最佳。
4. D. 细节题。根据 Although he works with the FBI now, his family insists he’s just “a regular kid” 可以看出来，Jonathan 是一个正常的孩子，但他却做出了一些不寻常的事情。

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