Recently I bought an ancient Chinese vase, __________ was very reasonable．

A.which price

B.the price of which

C.its price

D.the price of whose

答案及解析： B

解析：

这是一个非限制性定语从句.根据句意可知价格为花瓶的.在定语从句中表示谁的一般有两种情况，如果空白后的名词前没有冠词就用whose，如果名词前有冠词就用of which，故答案选B.试比较：The house，whose windows face south，is Mrs．Brown's．The house，of which the windows face south，is Mrs．Brown's．这座窗子面朝南的房子是布朗夫人的.