单选题 He had two houses. He lived with his wife and child in the outer house, ______ was comfortable and clean.
  • A.which
  • B.that
  • C.it
  • D.where
【正确答案】 A
【答案解析】[解析] 这里是由which引导的非限制性定语从句，用来修饰the outer house。