The next king of Prussia, Fretrick WilliamⅠ, the Amber Room belonged, decided not to keep it.
A. to which
B. to whom
C. in which
D. in whom
网友回答
A. to which
(答案→)B. to whom
C. in which
D. in whom
解析：考查定语从句。先行词为Fretrick WilliamⅠ，短语：belong to 属于，所以此空应填to whom，选B。