问题补充：
Recently I bought an ancient Chinese vase， was very reasonable.
A. the price of it
B. its price
C. the price of which
D. the price of whose
答案：
A. the price of it
B. its price
C. the price of which
D. the price of whose
解析：考查定语从句引导词。题意 最后我买了一个中国花瓶，他的价格十分合理。花瓶的价格，应为whose price = the price of which,故选 C项。
考点考查定语从句引导词
