His house, ( ) he bought for $10,000 ten years ago, is now wor

His house, ( ) he bought for $10,000 ten years ago, is now worth $35,000.
A、which
B、that
C、when
D、to which
【正确答案】：A
【题目解析】：非限制性定语从句引导词，先行词是物，只能用which，句子含义是他的房子，十年前购买是$10,000，现在值$35，000。