阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

    The Amber Room, one of the greatest  (wonder) of the world was a great work that took about ten years to make. In 1716, the Amber Room was (give) to the Russian people as a gift of friendship by William I , who loved soldiers more the Amber Room itself. In Russia, the room first served as a small reception hall for  (importance) visitors, later was moved and redesigned by Catherine Ⅱ. (fortunate), the Amber Room disappeared when the Nazi Germans and Russia were at war and until now nobody knows happened to it. In 2003，, a new Amber Room built by the Russians and Germans on the basis of the old photos  (be) ready for the people of St Petersburg when they celebrated the 300th birthday of (they) city.