I’ll never forget the day I was born.A. in whichB. thatC. on thatD. when

问题补充：

I’ll never forget the day I was born.

A. in which

B. that

C. on that

D. when

答案：

A. in which

B. that

C. on that

(答案→)D. when

解析：考查定语从句，先行词是the day，定语从句缺少时间状语，用when引导，句意是：我忘不了出生的日子。选D。