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

【答案】A
【解析】分析句子结构可知该处为定语从句，修饰先行词the days，the days在定语从句中作时间状语，要用关系副词when引导定语从句，所以答案是A。