问题补充：
Recently my father bought an ancient Chinese vase, was very reasonable.
A. which price
B. the price of which
C. its price
D. the price of whose
答案：
A. which price
(答案→)B. the price of which
C. its price
D. the price of whose
解析： 定语从句考查题。先行词为Chinese vase,关系词which指代vase，the price of which相当于whose price。最近父亲买了一个古代瓷瓶价格非常合理。选B
