The house, the roof of _______has been blown off by the wind， is a depressing sight
A、whose
B、which
C、whom
D、what
【正确答案】：B
【题目解析】：此句话的意思是房子的屋顶被大风吹走了，真是令人忧愁。分析句子可知，该句的结构是“The house is a depressing sight”主句结构完整,“the roof of _______has been blown off by the wind”在句中做从句，因为空处在从句中做主语，指代屋子，其前又有介词“of”所以引导词应为“which”。