It's not necessary to explain the truth there is spring wind there is green grassA. whi

问题补充：

Its not necessary to explain the truth there is spring wind, there is green grass．

A. which wherever

B. that which

C. which when

D. that wherever

答案：

A. which wherever

B. that which

C. which when

(答案→)D. that wherever

解析：

首先that引导同位语从句，解释前面的名词truth，同位语从句中又是一个由wherever引导的让步状语从句。故选D。