A that;tha B what;what C that;what D which;that 选C为什么

问题描述:

A that;tha B what;what C that;what D which;that 选C为什么
I have learned from my bitter experience___ we don't know_____we've gotuntill it's gone

I have learned from my bitter experience that we don't know what we've got until it's gone
从我的惨痛的教训那里,我知道:直到失去了,我们才知道我们拥有了什么