阅读下面短文，然后根据括号内所给汉语意思写出单词的正确形式（每空一词）．

Daniel Kristiansea is a 14﹣year﹣old schoolboy from Denmark．Recently，while doing his history homework about World WarⅡ，he had a surprising discovery （51）　　（在…后面） his family's home．He found the remains of a World WarⅡplane and a （52）　　（飞行员）．

After telling his father about his history homework，Daniel was encouraged to go out onto their farm with a special machine to find （53）　　（金属）．He and his father hoped they might find some old plates or something he could（54）　　（给…看） to his classmates at school．Much to their surprise，on the （55）　　（第五） day，they found some broken plane pieces．When they （56）　　（挖） down seven meters，they suddenly came across pieces of （57）　　（灰色的） clothes．They reported what they found to the government，and soon the news was （58）　　（广泛地） heard across Danmark．Each day their house was （59）　　（拥挤的） with news reporters．

Daniel's father，Klaus，remembered being told by his grandpa that a plane from （60）　　（德国） had hit their farm during World WarⅡ．But Klaus thought it was just a good story．Now it turns out to be true．