英语选择：麻烦帮我分析一下句子成分,刚刚学完定语从句,很抱歉我没有财富值了,

英语选择：麻烦帮我分析一下句子成分,刚刚学完定语从句,很抱歉我没有财富值了,
18.Is this factory __D__we visited last year
A.in which B.around that C.whom D.the one(为什么不选A)
26.His parents wouldn’t let him marry anyone _D_____ family was poor.
A.of whom　　 B.whom　　　　 C.of whose　　　 D.whose　(为什么不选c)　
36.On the wall hung a picture,_A____ color is blue.
A.whose　　　　　 B.of which　　　　 C.which　　　　　　 D.its(为什么不选B)