求具体的解题过程和原理the days are gone＿physical strength was all you needed to make a living.A.when B.that

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求具体的解题过程和原理
the days are gone＿physical strength was all you needed to make a living.
A.when B.that

选A
定语从句,先行词【days】在从句中作状语
【physical strength was all you needed to make a living in the days】原句是完整的,缺了的是时间状语,所以用when
定语从句中that做关系代词表示人、物、事,在从句中做宾语成分时可省略‘；而
when做关系副词在从句中是要做时间状语的,不能省略

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