Catherine Ⅱ had the Amber Room moved to a palace outside St. Petersburg she spent her summers.
A. where
B. which
C. that
D. at which
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(答案→)A. where
B. which
C. that
D. at which
解析：考查定语从句。本题的先行词是St. Petersburg，定语从句中的句子结构很完整，故使用关系副词where=in which。故A正确。