问题补充:
Ill never forget the day I was born.
A. when
B. that
C. on which
D. both A and C
答案:
A. when
B. that
C. on which
(答案→)D. both A and C
解析:考查定语从句。本定语从句的先行词是the day,定语从句的结构很完整,主语是I,后面是系表结构,句子很完整,故使用关系副词,先行词指时间,故使用关系副词when, 关系副词经常等于介词+关系代词。本题when=on which.故D正确。