第二节语法填空（共10小题；每小题2分，满分20分）

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，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

The Amber Room, which took about ten years to make, 41____(consider) one of the wonders of te world. It was originally built for the palace of Frederick William the I, 42___ gave it to Peter the Great as a gift. 43____return, he got a troop of 44____Czar’s best sodiers. In Russia, the room first served as a small reception hall for important 45____ (visit) and later moved and redsigned by Catherine II. 46_____(sad), the Amber Room mysteriously disappeared 47_____ the Nazi Germany and Russia were at war and up till now nobody knows 48_____ happened to it. In the spring of 2003, however, a new Amber Room, 49_____(build) by the Russians and Germans on the basis of old photos, was ready for the people of St Petersbur 50_____(celebrate) the 300th birthday of their city.