【题目】Lucas went past a wooden house, in front of ________ sat an old man, pipe in hand.
A. that B. what
C. which D. whom
在线课程【答案】C
【解析】考查非限制性定语从句。句意：Lucas经过一个木房子，房子前坐着一个手里拿着烟斗的老人。分析语境可知in front of which sat an old man为“介词+which”引导的非限制性定语从句，先行词为house，所以用which引导。故选C。