问题
选择题
Do take each subject seriously in college and even though you learn isn’t important for your life, the learning skills you acquire will be something to be cherished forever.
A．when
B．where
C．which
D．what
答案
答案：D
根据句子结构，and后是一个含有让步状语从句的一个复合句，而让步状语从句中又含有一个主语从句，what 在主语从句中做主语。故选D。