the furniture ___I ordered was sent to the wrong address

C.which,这里的which就相当于前面的the furniture ，做I ordered 定语从句的先行词，是后面句子was sent to the wrong address
的主语，在这个句子was sent to the wrong address
做句子的主语，是被动语态。

C.我预购的家具送错了地址

in which =where 表示地点

which是修饰the furniture 的定语从句本回答被提问者采纳

c
furniture 是名词

C