The house，__________ was damaged，has now been repaired．
A.which the roofB.the roof of whichC.which roofD.that whose roof在线课程B
解析：
在定语从句中，表示“……（物）的”，既可用“whose+名词”也可用“the+名词+of which”来引出从句。C项which作为关系代词一般不在从句中作定语，D项whose roof前多了that，故均不可选。