It is difficult for us to learn a learn in life ___we have actually had that lesson

问题描述:

It is difficult for us to learn a learn in life ___we have actually had that lesson
A,when .B.after.C.since D.until 应该选择那个

应该是D.until.这句话的大概意思就是说我们很难领悟一个道理直到我们真正经历时才能懂得.