【题目】—When did you get to know your girlfriend?
—It was in 2015 ________ she was working as a volunteer in Africa.
A. thatB. which
C. whenD. then
在线课程【答案】C
【解析】
考查定语从句连接词。句意:——你什么时候认识你女朋友的?——是在她在非洲做志愿者的2015年。本句为定语从句修饰先行词2015,且先行词在从句中做时间状语,故用关系副词when。故选C。