【题目】The doctor refused to use traditional Chinese herbal medicine, __________ he was not sure about.
A. whose side effects B. the side effects of whose
C. of which side effects D. side effects of which
在线课程【答案】A
【解析】
考查定语从句
句意：医生拒绝使用传统中药，他对它的副作用不太清楚。中药是先行词，和副作用是所属关系，表示…的用whose 或of which the+名词。故选A。