The company, ________ Mr．Smith was until recently the chairman, has made loss of 3 000 000 pounds this year．

A.that

B.which

C.of which

D.in which

答案及解析： C

解析：

句意是“这家公司今年亏损达300万英镑，直到不久前史密斯先生还是它的董事长”。当先行词是物时，关系代词which可以作介词的宾语，并且介词常可以放在which之前。“介词+which”能够引导限制性定语从句或非限制性定语从句。