The days are gone physical strength was all you needed to make a living.A. whenB. thatC.

The days are gone physical strength was all you needed to make a living.
A. when
B. that
C. where
D. which

(答案→)A. whenB. thatC. whereD. which解析：考查定语从句。先行词是the days，本题的先行词与定语从句之间有间隔，定语从句“physical strength was all you needed to make a living”是主系表结构，不缺少成分，且先行词指的是时间，故用when引导定语从句，故选A。

我明天再问问老师，叫他解释下这个问题