【题目】Last week, I bought an interesting story book, _________ is very beautiful.
A. which cover B. the cover of which
C. its cover D. the cover of whose
在线课程【答案】B
【解析】试题分析：考查定语从句：句意：上个星期，我买了本有趣的故事书，书的封面很漂亮。定语从句中cover缺少定语，可以用whose修饰cover，或用the cover of which还有of which the cover，选B。