问题补充:
(·哈尔滨四校高三统一检测)The old man often looked back on the past days he worked hard to make a living.
A. which
B. when
C. where
D. that
答案:
A. which
(答案→)B. when
C. where
D. that
解析:B考查定语从句。句意:这个老人经常回顾他过去辛苦谋生的日子。分析句子成分可知,先行词为the past days,空处在定语从句中充当时间状语,故用when引导。